Which of the sets of ordered pairs represents a function? a = {(−4, 5), (1, −1), (2, −2), (2, 3)} b = {(2, 2), (3, −2), (9, 3), (9, −3)}
a only a
b only b
c both a and b
d neither a nor b

D Neither A nor B

Step-by-step explanation:

In each relation, there are some x-coordinates that repeat, and whenever that happens, the relations are not functions.

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