Determine the range of the following graph:
-12-11-10-9
21095432
11
8
7
6
1
7-6-5-4-3-2-¹1/1
INSTRY
-2
-3
-4
-6
-8
-9
-10
-11
-12
k
2 3 4 5 6 7 8 9 10 11 12