minta jawaban nya. makasih

No 7.
F(x) = ax + b
F(4) = a4 + b = 5
F(-2) = a.-2 + b = -7
_________ -
6a = 12
a = 12/6 => 2
-2a + b = -7
-2.2 + b = -7
b = -7 + 4
b = -3
F(x) = 2x + (-3)

No.9
F(x) = ax +b
F(2) = a.2 + b = -2
F(3) = a.3 + b = 13
_________-
-a = -15
a = 15
2a + b = -2
2.15 + b = -2
b = -2 -30
b = -32

f(4) = a.4 + b
15.4 + (-32)
60 - 32
28

Semoga membantu, bisa dikoreksi lagi penjumlahannya, takut salah