Diketahui g(x) = mx + n.jika g(2) = 1 dan g(3) = -1,nilai m dan n berturut-turu

g(x) = mx + n
g(2) = 1
g(3) = -1

g(2) = m(2) + n = 1
g(3)= m(3) + n = -1

2m + n =1
3m + n =-1  → kemudian dikurangi

hasilnya,
 -1m = 2
    m = 2/-1
    m = -2

2m + n = 1
2 (-2) + n =1
-4 + n =1
       n = 1+4 = 5

jadi, nilai m= -2 dan nilai n=5