Question

Dik : f (x) = ax + b
f (3) = 8
f (6) = 18
Ditanya :a dan b ?

Answer 1

F(x) = ax+b
f(3) = 8
3a+b = 8 ---> b=8-3a
f(6) = 18
6a+b = 18
6a+8-3a = 18
3a = 18-8
3a = 10
a = 10/3
b = 8-3a
b = 8-3(10/3)
b = 8-10
b = -2

jadi, a=10/3 dan b=-2