The function f(x) is shown on the graph.
18y
15-
12
What is f(0)?
00 only
0-6 only
O-2, -1, 1, and 3 only
O -6, -2, -1, 1, and 3 only
6-
3
x
32-13 12 11
60
-9-
| 12
-15
-18+