Jawabanmu

2014-06-16T09:43:24+07:00
F(x) = ax - 6
Ccari dulu nilai a dari:
f(-2) = a(-2) - 6 = -2
-2a - 6 = -2
-2a = 4
a = -2
didapat f(x) = -2x - 6 sehingga 
nilai f(4) = -2(4) - 6 = -8 - 6 = -14
jadi, nilai f(4) = -14
2014-06-16T09:45:54+07:00
F(-2)=-2
-2a-6=-2
-2a=4
a=-2
f(x)=-2x-6
f(4)=-8-6 =-14