ini lagi ya kak trimakasih banyak mohon dijawab

W(x) = ax + b
W(0) => 0 + b = 5
b = 5

W(-7) => -7a + b = -9
-7a + 5 = -9
-7a = -14
a = 2

W(x) = 2x + 5
-107 = 2x + 5
-112 = 2x
x = -56