The function f(x) is shown on the graph. What is f(0)?
18
15
O O only
0 -6 only
O-2, -1, 1, and 3 only
O-6, -2, -1, 1, and 3 only
12
f
9
6
3
-3
12
2.
х
-3
Oy
-9
-12
-15
18

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.