Question

Diketahui : f(x) = mx+n. jika f(-1) = 2 dan f(2) = 11,nilai f(4) adalah

Answer 1

F(x)= mx + n

f(-1) = -m +n = 2
f(2) = 2m + n = 11 -
        -3m = -9
          m= 3

-m + N = 2
-3 + n =2
     n = 5

maka f(4)= 4m + n = 4(3) + 5
                            = 12 + 5 = 17