Tolong bantu jwb no 23 ya kak serta caranya

Kelas 8 Matematika
Bab Fungsi

(1, 1) dan (2, 3)

f(x) = ax + b

f(1) = a + b = 1
f(2) = 2a + b = 3

2a + b = 3
..a + b = 1
--------------- -
a = 2

a + b = 1
2 + b = 1
b = 1 - 2
b = -1

f(x) = 2x - 1

✩✩ A ✩✩

smoga membantush_!

#jwbnny ad dipict