Nomor 43 dong kha kha
Jawaban Terkonfirmasi
Mapel : Matematika
Bab : Fungsi
f(x) = ax + b
f(-2) = -2a + b = -8
f(5) = 5a + b = 13
————————- -
-7a = -21
a = -21/-7
a = 3
5a + b = 13
5(3) + b = 13
15 + b = 13
b = 13 – 15
b = -2
f(x) = ax + b
f(-7) = 3(-7) + (-2)
f(-7) = -21 – 2
f(-7) = -23