YG PINTAR MTK TOLONG DIJAWAB PAKE JALAN NOMOR 2 SAJA!!!

f(x) = ax + b
f(2) = 2a + b = - 2
f(3) = 3a + b = 13
--------------------------(-)
- a = - 15
a = 15

2a + b = - 2
2.15 + b = - 2
30 + b = - 2
b = - 2 - 30
b = - 32

f(x) = 15x - 32