tolong bantu jawab lah kak atau abg yang tau

f(x) = ax + b
f(2) = 2a + b = - 2
f(-3) = - 3a + b = 13

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

- 3a + b = 13
- 3a - 2 - 2a = 13
- 3a - 2a = 13 + 2
- 5a = 15
- a = 3
a = - 3

b = - 2 - 2a
b = - 2 + 6
b = 4

f(-1) = - a + b

- a + b = 3 + 4 = 7

Maaf Kalau Salah