HELP!!!!

(04.01)

Which of the sets of ordered pairs represents a function? (4 points)

A = {(1, −2), (3, −5), (5, 2), (7, 5)}
B = {(4, 2), (4, −2), (9, 3), (9, −3)}

Group of answer choices

Only A

Only B

Both A and B

Neither A nor B