Suatu fungsi linear ditentukan oleh y=2x-6 dengan range {-8,-6,-4,-2} maka domainnya

y=2x-6
-8 = 2x-6
-8+6 = 2x
-2 = 2x
-2/2 = x
-1 = x

y=2x-6
-6 = 2x-6
-6+6 = 2x
0 = 2x
0/2 = x
0 = x

y=2x-6
-4 = 2x-6
-4+6 = 2x
2 = 2x
2/2 = x
1 = x

y=2x-6
-2 = 2x-6
-2+6 = 2x
4 = 2x
4/2 = x
2 = x

domain = {-1, 0, 1, 2}