diketahui rumus fungsi f(x)=ax+b tentukan nilai a dan b jika f(4)=17 dan f(-3)=-18

f(4) = 4a+b = 17
f(-3) = - 3a+b =-18
_______________ -
= 7a+0 = 35
a = 35/7
a = 5
Mencari b
4a+b = 17
4×(5)+b = 17
20+b = 17
b = 17-20
b = - 3

Jadi jawabannya
f(x) = ax + b
f(x) = 5x+(-3) atau 5x-3