HELP PL ASAP ASAP I NEED HELPP which set of ordered pairs represents a function?

A {(-2,5), (6,9), (8,-4), (8,7)}
B{(-1,4),(-5,-2), (6,1),(-2,-2)}
C {(-5, -6),(-5,3), (-7, -8),(-1, -9)}
D{(-8,-4),(-8,-5),(-6, -1), (3,6)}

Only set B

Step-by-step explanation:

Look for pairs (x, y) in the set, where the x value is NOT repeated connecting it with a different y value. The only one like that is set B.

All other sets have repeated x values in their pairs: (8, -4), (8, 7)

(-5,-6) (-5, 3)

and (-8,-4) (-8,-5)

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