fungsi linear

1 Nov

Bentuk Umum fungsi linier:

f(x) = y = ax + b , a adalah gradien (kemiringan garis)

a. Grafik Fungsi Linier

Langkah-langkah menggambar grafik fungsi linier:

1. menentukan titik potong terhadap sumbu y , x = 0

2. menentukan titik potong terhadap sumbu x , y = 0

Contoh:

Gambar grafik fungsi linier berikut:

a. f(x) = 2x + 8 b. y = -2x + 8

jawab:

a. f(x) = 2x + 8

* x = 0 ————- f(0) = y = 2 . 0 + 8 = 8 —————– (0 , 8 )

* y = 0 ————- 0 = 2x + 8

x = -4 —————– ( -4 , 0 )

* grafiknya:

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