Which relation represents a function?

StartSet (0, 0), (2, 3), (2, 5), (6, 6) EndSet

StartSet (3, 5), (8, 4), (10, 11), (10, 6) EndSet

StartSet (negative 2, 2), (0, 2), (7, 2), (11, 2) EndSet

StartSet (13, 2), (13, 3), (13, 4), (13, 5) EndSet

(-2, 2), (0, 2), (7, 2), (11, 2)

Step-by-step explanation:

A relation must have no repeating x-values for it to be a function.

Set C does not have any repeating x-values, so it is a function.

Sets A, B, and D have repeating x-values, so they are not functions.

A: (0, 0), (2, 3), (2, 5), (6, 6)

B: (3, 5), (8, 4), (10, 11), (10, 6)

D: (13, 2), (13, 3), (13, 4), (13, 5)