Question

The function f(x) is shown on the graph.
18y
15
12f(x)
9
6
If f(x) =0, what is x?
0 only
O-6 only
O-2, 1, or 3 only
O-6, -2, 1, or 3 only
-3
-1
-3-
20
-6
15-
-18t
3
2
3