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