diketahui f(x) = ax +b. jika f(-4) = 13,f(3)=-1, tentukan f(-2)

Langsung aja y

f(-4) = -4a + b = 13
f(3) = 3a + b = -1
______________-
-7a = 14
a = -2

3a + b = -1
b = -1 - 3(-2)
b = -1 + 6
b = 5

f(x) = ax + b
f(x) = -2x + 5

f(-2) = -2(-2) + 5
f(-2) = 4 + 5
f(-2) = 9

Semoga berguna +_+