Jawabanmu

2014-05-02T14:19:07+07:00
f(x) = ax + b
f(-3) = -7
f(2) = 13
nilai f(5) adalah…


-3a+b= -7
 2a+b=13 -
5a  =20
a    =20/5
a=4

lalu mencari nilai b
-3a+b= -7
-3(4)+b= -7
-12+b= -7
b= -7+12
b=5

mencari nilai f(5)
f(5)=ax+b
     =4(5)+5
     =20+5
     =25
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