Fungsi g dirumuskan dengan g (x)=ax + b jika g (5)= 8 dan g (2)=-1.tentukan nilai a dan b

g(x) = ax+b
g(5) = 8. => 5a+b = 8
g(2) = -1. => 2a+b = -1

5a+b = 8
2a+b = -1
__________ --
3a = 9
a = 9/3
a = 3

2a+b = -1
2(3)+b = -1
6+b = -1
b = -7

jadi a = 3 dan b = -7