Determine the range of the following graph:
12
11
10
9
8
7
6
4
3
NG
-12-11-10-9-7 -6 -5 -4/3 -2 -1
- 1
1 2 3 4 5 6 7 8 9 10 11 12
-3
-4
-5
-6
-7
-8
-9
-10
-12