Which set of ordered pairs represents a function?
A. {(-5, -1), (9,7), (–2, 6), (–3, 7)}
B.{(+7,5), (–9, –4),(-3, -1), (–3,4)}
C. {(5,-3), (1, 2), (1,8), (4,6)}
D.{(-2,9), (-2,6), (1, -5),(-4,-8)}

Which Letter is it??

Plz answer ASAP

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