Jika f(x)=2x+3 dengan -2

X = -1
2 x -1 +3 = -2+3 = 1

x = 0
2 x 0 +3= 0 + 3 = 3

x = 1
2 x 1 + 3 = 2+3 = 5

x = 2
2 x 2 + 3= 4+3 = 7

x = 3
2 x 3 + 3 = 6 +3 = 9

jadi range = { 1,3,5,7,9}