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.