Which relation does not represent a function? A. { (3, 0) }, { (0, 3) }. B. { (6, - 2), (5, - 2) }. C. { (3, 4), (3, 5) } D. { (5, 5), (-5, - 5) }. E. { (1, - 2), (-2, 1) }

A function will not have repeating x values ... all the x values will be different. But u don't want a function ... so u want repeating x values.

That leaves C ... because u have repeating x values (3 is ur repeating x value) ... so C is not a function