suatu fungsi dirumuskan F(×)=ax+b. jika f(-2)=-10 dan f(3)=5, maka nilai f(-3) adalah

Kelas 8 Matematika
Bab Fungsi

f(x) = ax + b

f(-2) = -2a + b = -10
f(3) = 3a + b = 5

3a + b = 5
-2a + b = -10
------------------- -
5a = 15
a = 3

3a + b = 5
3 . 3 + b = 5
b = 5  - 9
b = -4

f(x) = 3x - 4

f(-3) = 3 . -3 - 4
f(-3) = -9 - 4
f(-3) = -13

jawabannya -13. caranya ada disini yaa