Question

F(3)=-1
f(-1)=-9
hitunglah f(-3)

Answer 1

Misal
f(x) = ax + b

f(3) = 3a + b = -1
f(-1) = -a + b = -9  -----> b = a - 9
subtitusikan
3a + b = -1
3a + (a - 9) = -1
3a + a = -1 + 9
4a = 8
 a = 8/4
 a = 2

b = a - 9
b = 2 - 9
b = -7
jadi
f(x) = 2x - 7
f(-3) = 2(-3) -7
      = -6 - 7
      = -13

jangan lupa terima kasih....!!!