Determine the domain of the following graph:
12
11
10
9
8
O
7
6
5
4
-12-11-10-9-8-7-6-4-2-1
3
2
1
y
-1
-2
-3
4
-5
-6
-7
-8
-9
-10
-11
-12
1 2 3 4 5 6 7 8 9 10 11 12
x