Question

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

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

Answer 1

Set A represents a function because each input (x-value) corresponds to exactly one output (y-value). Set B does not represent a function because the input values 9 are paired with two different output values (3 and -3).