Answer:
None of the relations shown are a function
Explanation:
We can use the vertical line test to determine if it is a function
Take a line that goes up and down. If it touches 2 or more points, then it is not a function.
A is not a function because it touches 2 points at -1
B is not a function because it touches 2 points at -2
C is not a function because it touches 2 points at 0
None of the relations shown are a function