Which of the following tables represents a relation that is a function?

Question

x y
2 −5
2 −3
2 0
2 3
2 5

x y
−3 0
−1 3
0 4
3 0
4 3

x y
−4 2
−3 2
0 −2
0 2
4 2

x y
−4 −2
−3 4
−1 −1
−1 2
3 −3

Answer 1

The second table represents a relation that is a function, as each input value (x) corresponds to a unique output value (y).