Question

Which of the sets of ordered pairs represents a function?

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

A: Only A

B: Only B

C: Both A and B

D: Neither A nor B

Answer 1

A. Only A does, as you cannot have the same number having more than one answers.