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

f(-1) = 2, jadi f(-1) = -m +n = 2
f(2) = 11, jadi f(2) = 2m+n = 11

Gunakan spldv!
-m + n = 2
n = 2 + m

2m +n = 11
2m + (2+m) = 11
3m +2 = 11
3m = 9
m = 3

n = 2+m
n= 2+3 = 5

jadi f(4)= m.4+n = 3.4+5 = 17