jawabbbb no 5 no 8 pake caraaaa

jawab

f(x)= ax + b
f(2) = 16  → 2a + b = 16..(i)
f(-4) = - 26 →-4a + b = - 26 ..(ii)

(i) dn (ii)
2a + b = 16
-4a + b = - 26 ||(-)
6a = 42
a = 7

(8)  f(x) = ax +b
f(-1) = - 6 → -a + b = - 6
f(2)= 9 → 2a + b = 9 ||(-)
-a = - 15
a = 15

-a + b = -6
b = -6 + a
b = -6 +15
b = 9