Jawabanmu

2014-09-08T20:00:06+07:00
F(x) = mx+n
f(-1) = -m + n = -8 ......1
f(3) = 3m +n = 12  .......2
_______________ -
-4m = -20
m = 5
substitusi ke pers. 1
-5 + n = -8
n = -3
f(-5) = 5.(-5) -3
= -25 - 3
=-28
1 4 1
2014-09-08T20:02:07+07:00