fungsi f( x ) = ax - 6. jika f ( 2 ) = 1 , maka f ( 5 ) adalah....

x = 2
f(x) = 1

1 = a(2) - 6
1+6 = 2a
7/2 = a


maka, f(5)...

f(5) = 7/2 x 5 - 6
f(5) = 35/2 - 6
f(5) = 23/2
atau
f(5) = 11,5