Mohon jawaban Dan jalannnya..no.11 terimakasih

g(x) = ax - b

g(-1) = a.(-1) - b
= -a - b
= 7

g(2) = a.2 - b
= 2a - b
= 1

-a - b = 7
2a - b = 1
________ _
-3a = 6
a = -2

-a - b = 7
-(-2) - b = 7
2 - b = 7
b = -5

g(-2) = (-2)(-2) - (-5)
= 4 + 5
= 9 (D)