Bantu Dong Lumayan Gampang kok ​

c. f(x) = 3x + 4

Penjelasan dengan langkah-langkah :

`Buat model matematika

f(x) = ax + b

f(2) = 2a + b = 10 … pers (1)

f(-4) = -4a + b = -8 … pers (2)

`Eliminasi variabel b

 2a + b = 10

-4a + b = -8

__________ –

6a = 18

  a = ¹⁸⁄₆

  a = 3

`Substitusi a ke pers (1)

  2a + b = 10

2(3) + b = 10

    6 + b = 10

          b = 10 – 6

          b = 4

`Rumus fungsi

f(x) = ax + b

f(x) = 3x + 4