Which of the following represents a relation that is not a function? A. x - 8 - 6 - 8 1 y 31 29 37 31 B. x - 8 - 6 6 12 y 31 29 37 31 C. x - 8 - 6 - 2 1 y 31 29 37 31 D. x 6 - 6 12 - 8 y 31 29 37 31

A function will not have any repeating x values. It can have repeating y values, but the x values all have to be different. However, we r looking for the one that is not a function ... so we need the one that has repeating x values ... and that would be A. Notice that it has repeating - 8's, meaning that it is not a function.