{"id":282864,"date":"2020-06-21T11:22:19","date_gmt":"2020-06-21T04:22:19","guid":{"rendered":"https:\/\/quipperhome.wpcomstaging.com\/?p=282864"},"modified":"2022-03-01T18:02:25","modified_gmt":"2022-03-01T11:02:25","slug":"gradien-matematika-kelas-8","status":"publish","type":"post","link":"https:\/\/quipperhome.wpcomstaging.com\/mapel\/matematika\/gradien-matematika-kelas-8\/","title":{"rendered":"Gradien &#8211; Matematika Kelas 8"},"content":{"rendered":"<div id=\"attachment_282890\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-282890\" class=\"size-full wp-image-282890\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-4.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-4.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-4-768x512.png 768w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-4-585x390.png?crop=1 585w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-4-263x175.png?crop=1 263w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-4-300x200.png 300w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282890\" class=\"wp-caption-text\">Foto: freepik.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Hai Quipperian, bagaimana kabarnya? Semoga selalu sehat dan tetap semangat belajar ya. Dengan belajar, kamu tetap bisa produktif meskipun hanya di rumah saja. Pada pertemuan kali ini, Quipper Blog akan membahas tentang gradien. Apa itu gradien? Contoh mudahnya seperti ini.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pak Sapto harus memindahkan 10 karung beras ke atas truk. Untuk memudahkan pekerjaannya, apa yang harus Pak Sapto lakukan? Cara termudahnya adalah dengan membuat papan kayu yang dimiringkan, sehingga Pak Sapto bisa memindahkan karung beras hanya dengan mendorongnya.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jika digambarkan papan kayu yang dimiringkan tersebut berbentuk garis lurus dengan kemiringan tertentu. Kemiringan inilah yang biasa disebut gradien. Ingin tahu selengkapnya tentang gradien? <\/span><em><span style=\"font-weight: 400;\">Check this out<\/span><\/em><span style=\"font-weight: 400;\">!<\/span><\/p>\n<h2><strong>Persamaan Garis Lurus<\/strong><\/h2>\n<div id=\"attachment_282885\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-282885\" class=\"size-full wp-image-282885\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-2.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-2.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-2-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-2-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282885\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Nah, sebelum membahas lebih lanjut tentang gradien, kamu harus tahu dulu apa itu persamaan garis lurus.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Persamaan garis lurus adalah perbandingan antara nilai koordinat pada sumbu X dan sumbu Y yang terletak dalam satu garis. Adapun contoh persamaan garis lurus adalah <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = 2<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> + 4. Untuk bentuk umumnya adalah <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = <\/span><em><span style=\"font-weight: 400;\">mx<\/span><\/em><span style=\"font-weight: 400;\"> + c di mana <\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> = variabel, <\/span><em><span style=\"font-weight: 400;\">c<\/span><\/em><span style=\"font-weight: 400;\"> = konstanta, dan <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><span style=\"font-weight: 400;\"> = gradien. Dengan demikian, persamaan <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = 2<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> + 4 memiliki gradien 2. Untuk mempermudah pemahamanmu tentang gradien, simak gambar berikut.<\/span><\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-282880\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-a.png\" alt=\"\" width=\"360\" height=\"285\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-a.png 360w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-a-300x238.png 300w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Garis di atas melalui titik A (-4,0) dan B (0,4) dengan persamaan garis lurusnya adalah <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = <\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> + 4. Dengan demikian, gradiennya adalah 1.<\/span><\/p>\n<h2><strong>Pengertian Gradien<\/strong><\/h2>\n<div id=\"attachment_282886\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-282886\" class=\"size-full wp-image-282886\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-1.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-1.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-1-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-1-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282886\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Gradien adalah bilangan yang menyatakan tingkat kemiringan suatu garis. Semakin miring suatu garis, semakin besar gradiennya. Untuk menentukan suatu gradien garis, kamu harus tahu dulu persamaan garisnya. Lalu, bagaimana cara menentukan gradien?<\/span><\/p>\n<h3><strong>1. Gradien garis lurus yang melalui dua titik<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Misalnya titik A (<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><sub><em><span style=\"font-weight: 400;\">1<\/span><\/em><\/sub><span style=\"font-weight: 400;\">, <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><sub><em><span style=\"font-weight: 400;\">1<\/span><\/em><\/sub><span style=\"font-weight: 400;\">) dan B (<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><sub><em><span style=\"font-weight: 400;\">2<\/span><\/em><\/sub><span style=\"font-weight: 400;\">, <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><sub><em><span style=\"font-weight: 400;\">2<\/span><\/em><\/sub><span style=\"font-weight: 400;\">) melalui suatu garis <\/span><em><span style=\"font-weight: 400;\">a<\/span><\/em><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282879\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-b.png\" alt=\"\" width=\"243\" height=\"218\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Untuk menentukan gradien garisnya, kamu bisa mencari masing-masing komponen <\/span><em><span style=\"font-weight: 400;\">x <\/span><\/em><span style=\"font-weight: 400;\">dan <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> yang melalui garis <\/span><em><span style=\"font-weight: 400;\">a<\/span><\/em><span style=\"font-weight: 400;\">.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Komponen <\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> = <\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><sub><em><span style=\"font-weight: 400;\">2<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> \u2013 <\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><sub><em><span style=\"font-weight: 400;\">1 <\/span><\/em><\/sub><span style=\"font-weight: 400;\">= <\/span><span style=\"font-weight: 400;\">\u2206<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Komponen <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><sub><em><span style=\"font-weight: 400;\">2<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> \u2013 <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><sub><em><span style=\"font-weight: 400;\">1<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> = <\/span><span style=\"font-weight: 400;\">\u2206<\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Untuk persamaan gradiennya adalah sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282878\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-c.png\" alt=\"\" width=\"165\" height=\"74\" \/>\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jika diketahui dua titik pada bidang koordinat, gunakan persamaan gradien di atas.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk lebih jelasnya, simak contoh soal berikut.<\/span><\/p>\n<h4><strong>Contoh Soal 1<\/strong><\/h4>\n<p><span style=\"font-weight: 400;\">Tentukan gradien garis yang melalui titik A (-2,3) dan B(-1,5)!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gradien garis yang melalui A (-2,3) dan B(-1,5) dirumuskan sebagai berikut<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282877\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-d.png\" alt=\"\" width=\"185\" height=\"131\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, gradien garis yang melalui titik A (-2,3) dan B(-1,5) adalah 2.<\/span><\/p>\n<h3><strong>2. Gradien garis yang saling sejajar<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Jika kamu menemukan ada dua atau lebih garis lurus yang saling sejajar, maka gradien masing-masing garisnya bernilai sama. Contohnya seperti berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282876\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-e.png\" alt=\"\" width=\"279\" height=\"257\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gradien garis a<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282875\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-f.png\" alt=\"\" width=\"243\" height=\"116\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gradien garis b<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282874\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-g.png\" alt=\"\" width=\"216\" height=\"112\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gradien garis c<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282873\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-h.png\" alt=\"\" width=\"255\" height=\"114\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gradien garis d<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282872\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-i.png\" alt=\"\" width=\"245\" height=\"123\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Berdasarkan perhitungan di atas, bisa disimpulkan bahwa garis-garis yang saling sejajar memiliki gradien yang sama. Untuk lebih jelasnya, simak contoh soal berikut.<\/span><\/p>\n<h4><strong>Contoh Soal 2<\/strong><\/h4>\n<p><span style=\"font-weight: 400;\">Tentukan gradien garis <\/span><em><span style=\"font-weight: 400;\">a <\/span><\/em><span style=\"font-weight: 400;\">yang melalui titik (4,3) dan sejajar garis <\/span><em><span style=\"font-weight: 400;\">b<\/span><\/em><span style=\"font-weight: 400;\"> dengan persamaan <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = 3<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 1.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Di soal disebutkan bahwa gradien garis <\/span><em><span style=\"font-weight: 400;\">a<\/span><\/em><span style=\"font-weight: 400;\"> sejajar dengan garis <\/span><em><span style=\"font-weight: 400;\">b<\/span><\/em><span style=\"font-weight: 400;\">. Artinya, Quipperian harus mampu menganalisis bahwa gradien garis <\/span><em><span style=\"font-weight: 400;\">a<\/span><\/em><span style=\"font-weight: 400;\"> dan <\/span><em><span style=\"font-weight: 400;\">b<\/span><\/em><span style=\"font-weight: 400;\"> adalah sama.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pertama, tentukan gradien garis <\/span><em><span style=\"font-weight: 400;\">b<\/span><\/em><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Persamaan garis <\/span><em><span style=\"font-weight: 400;\">b<\/span><\/em><span style=\"font-weight: 400;\">: <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = 3<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 1<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Persamaan garis lurus umum: <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = <\/span><em><span style=\"font-weight: 400;\">mx<\/span><\/em><span style=\"font-weight: 400;\"> + c<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Dengan demikian, nilai <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><span style=\"font-weight: 400;\"> = 3. Artinya, gradien garis <\/span><em><span style=\"font-weight: 400;\">b<\/span><\/em><span style=\"font-weight: 400;\"> = 3.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ingat bahwa gradien garis <\/span><em><span style=\"font-weight: 400;\">b<\/span><\/em><span style=\"font-weight: 400;\"> sama dengan <\/span><em><span style=\"font-weight: 400;\">a<\/span><\/em><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">b<\/span><\/em><\/sub> <span style=\"font-weight: 400;\">= <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">a<\/span><\/em><\/sub> <span style=\"font-weight: 400;\">= 3.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, gradien garis <\/span><em><span style=\"font-weight: 400;\">a<\/span><\/em><span style=\"font-weight: 400;\"> = 3.<\/span><\/p>\n<h3><strong>3. Gradien garis yang saling tegak lurus<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Untuk gradien garis yang saling tegak lurus berlaku hubungan:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282871\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-j.png\" alt=\"\" width=\"335\" height=\"243\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-j.png 335w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-j-300x218.png 300w\" sizes=\"(max-width: 335px) 100vw, 335px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Berdasarkan gambar di atas, garis <\/span><em><span style=\"font-weight: 400;\">k<\/span><\/em><span style=\"font-weight: 400;\"> tegak lurus garis <\/span><em><span style=\"font-weight: 400;\">h<\/span><\/em><span style=\"font-weight: 400;\">.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gradien garis <\/span><em><span style=\"font-weight: 400;\">k<\/span><\/em><span style=\"font-weight: 400;\"> adalah sebagai berikut.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282870\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-k.png\" alt=\"\" width=\"234\" height=\"114\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gradien garis <\/span><em><span style=\"font-weight: 400;\">h<\/span><\/em><span style=\"font-weight: 400;\"> adalah sebagai berikut.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282869\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-l-.png\" alt=\"\" width=\"247\" height=\"117\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Kira-kira, apa hubungan antara <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">k<\/span><\/em><\/sub> <span style=\"font-weight: 400;\">dan <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">h<\/span><\/em><\/sub><span style=\"font-weight: 400;\">?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jika ditarik kesimpulan, hasil perkalian antara <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">k <\/span><\/em><\/sub><span style=\"font-weight: 400;\">dan <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">h<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> menghasilkan nilai -1.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282868\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-m.png\" alt=\"\" width=\"173\" height=\"97\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, hasil perkalian gradien garis yang saling tergak lurus = -1.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Agar pemahamanmu semakin terasah, simak contoh soal berikut ini.<\/span><\/p>\n<h4><strong>Contoh Soal 3<\/strong><\/h4>\n<p><span style=\"font-weight: 400;\">Selidikilah hubungan antara garis <\/span><em><span style=\"font-weight: 400;\">p<\/span><\/em><span style=\"font-weight: 400;\"> yang memiliki persamaan 2<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> + 4<\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 3 = 0 dan garis <\/span><em><span style=\"font-weight: 400;\">q<\/span><\/em><span style=\"font-weight: 400;\"> yang memiliki persamaan 2<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> + 5 = 0.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Kira-kira, apa yang harus Quipperian lakukan, ya!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Yapp, pertama kamu harus mencari gradien masing-masing garis. Kemudian baru analisis hubungan antara kedua garis tersebut.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gradien garis <\/span><em><span style=\"font-weight: 400;\">p<\/span><\/em><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282867\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-n.png\" alt=\"\" width=\"186\" height=\"144\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gradien garis <\/span><em><span style=\"font-weight: 400;\">q<\/span><\/em><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">2<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> + 5 = 0<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">-y<\/span><\/em><span style=\"font-weight: 400;\"> = <\/span><em><span style=\"font-weight: 400;\">&#8211;<\/span><\/em><span style=\"font-weight: 400;\">2<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 5<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">y <\/span><\/em><span style=\"font-weight: 400;\">= 2<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> + 5<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">q<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> = 2<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Hubungan antara <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">p<\/span><\/em><\/sub> <span style=\"font-weight: 400;\">dan <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">q<\/span><\/em><\/sub><span style=\"font-weight: 400;\">: <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">p<\/span><\/em><\/sub> <span style=\"font-weight: 400;\">\u00d7<\/span> <em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">q<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> = <\/span><span style=\"font-weight: 400;\">&#8211;<\/span><span style=\"font-weight: 400;\">1<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\"> \u00d72=-1.<\/span><span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Berdasarkan hasil perhitungan di atas, terlihat bahwa hasil perkalian antara <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">p<\/span><\/em><\/sub> <span style=\"font-weight: 400;\">dan <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><sub><em><span style=\"font-weight: 400;\">q<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> menghasilkan nilai -1. Artinya, garis <\/span><em><span style=\"font-weight: 400;\">p<\/span><\/em><span style=\"font-weight: 400;\"> dan <\/span><em><span style=\"font-weight: 400;\">q<\/span><\/em><span style=\"font-weight: 400;\"> saling tegak lurus.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, hubungan antara garis <\/span><em><span style=\"font-weight: 400;\">p<\/span><\/em><span style=\"font-weight: 400;\"> dan <\/span><em><span style=\"font-weight: 400;\">q<\/span><\/em><span style=\"font-weight: 400;\"> adalah saling tegak lurus.<\/span><\/p>\n<h4><strong>Contoh Soal 4<\/strong><\/h4>\n<p><span style=\"font-weight: 400;\">Selidiki hubungan antara persamaan garis <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = <\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 3 dan -3<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> + 3<\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 7 = 0.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pertama, Quipperian harus mencari nilai gradien masing-masing garis.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Garis <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = <\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 3<\/span><\/li>\n<\/ul>\n<p><em><span style=\"font-weight: 400;\">m<\/span><\/em><span style=\"font-weight: 400;\"> = 1<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Garis -3<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> + 3<\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 7 = 0<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282866\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/06\/Gradien-Matematika-Kelas-8-o.png\" alt=\"\" width=\"147\" height=\"101\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Oleh karena gradien garis <\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> = <\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 3 sama dengan garis -3<\/span><em><span style=\"font-weight: 400;\">x<\/span><\/em><span style=\"font-weight: 400;\"> + 3<\/span><em><span style=\"font-weight: 400;\">y<\/span><\/em><span style=\"font-weight: 400;\"> \u2013 7 = 0, yaitu <\/span><em><span style=\"font-weight: 400;\">m<\/span><\/em><span style=\"font-weight: 400;\"> = 1, maka kedua garis saling sejajar.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Itulah pembahasan Quipper Blog tentang gradien. Sebenarnya, materi gradien ini bisa kamu temukan lebih lengkap di persamaan garis lurus. Bingung cari dimana? Quipper Video menyediakan materinya secara lengkap dengan penjelasan tutor matematika yang super <\/span><em><span style=\"font-weight: 400;\">kece<\/span><\/em><span style=\"font-weight: 400;\">. <\/span><em><span style=\"font-weight: 400;\">So<\/span><\/em><span style=\"font-weight: 400;\">, tunggu apa lagi, buruan gabung bersama <\/span><a href=\"https:\/\/subscribe.quipper.com\/signup\"><strong>Quipper Video<\/strong><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Penulis: Eka Viandari<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hai Quipperian, bagaimana kabarnya? Semoga selalu sehat dan tetap semangat belajar ya. Dengan belajar, kamu tetap bisa produktif meskipun hanya di rumah saja. Pada&hellip;<\/p>\n","protected":false},"author":99400369,"featured_media":282890,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[679384888,679384865],"tags":[679385986],"ppma_author":[679386827],"class_list":["post-282864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mapel","category-matematika","tag-materi-gradien-kelas-8"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Gradien - Matematika Kelas 8 - Quipper Blog<\/title>\n<meta name=\"description\" content=\"Quipperian, yuk perdalam pengetahuan dan informasi kamu mengenai gradien lewat artikel berikut ini! 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