Jawabanmu

2014-02-09T09:33:40+07:00
A.
f(x) = ax+b

8 = 2a+b
5 = 1a+b
________ -
3 = a

5 = 3+b
2 = b

b.
f(x) = ax+b
f(x) = 3x+2
1 5 1
2014-02-09T09:49:08+07:00
F(x)=ax+b

8=2x+b
5=1x+b (di kurang)

= 3=x
5=1(3)+b
5=3+b
b=5/3