Diketahui fungsi f (x) =a×+b jika f (-2)=-17 dan f (5)=32 maka nilai a+b adalah

Kelas 8 Matematika
Bab Fungsi

f(x) = ax + b

f(-2) = -2a + b = -17
f(5) =   5a + b = 32
        
 5a + b = 32
-2a + b = -17
------------------- -
7a = 49
a = 49/7
a = 7

5a + b = 32
5 . 7 + b = 32
b = 32 - 35
b = -3

a + b
= 7 - 3
= 4