Answer: Undefined
Explanation:

This seems to be undefined.
Let's make a chart:
x #s | y #s
1
2
0
-1
-2
-------------------------------------
Let's take a number out of the chart to act as x:
f(x)=
-> f(x)=
->

Since the answer is negative, the answer should be the one that says undefined.
---- SORRY IGNORE WHAT I TYPED I JUST REALIZED IT IS WRONG PLS DELETE THIS