diketahui fungsi linear R:x➡ax + b memetakan 5➡-5, memetakan 8 ➡ 7, dan memetakan p➡19. nilai p adalah....

Langsung aja y

f(x) = ax + b

f(5) = 5a + b = -5
f(8) = 8a + b = 7
_____________-
-3a = -12
a = 4

5a + b = -5
b = -5 - 5(4)
b = -5 - 20
b = -25

f(x) = ax + b
f(x) = 4x - 25

f(p) = 4(p) - 25
19 = 4p - 25
4p = 19 + 25
4p = 44
p = 11

Semoga berguna +_+