Jika f(x) = px + q dan diketahui f(-2) = 5 dan f(2) = 1, maka f(x + 2) = ... .

f(x) = px + q
f(-2) = 5
-2p + q = 5

f(2) = 1
2p + q = 1

-2p+ q = 5
2p + q = 1
................(+)
2q = 6
q = 3

2p + q = 1
2p + 3 = 1
2p = -2
p= -1
f(x)= px + q
f(x) = -x + 3

f(x+2) = - (x+2) + 3
f(x+2) = -x + 1