PLEASE HELP I NEED THIS ASAP is this relation a function? justify your answer.
A. yes because every x- value corresponds with a single y- value.

B. no, because two points with the same y- value have different X- values.

C. yes, because every X- and Y- value is positive.

D. yes, because the number of X- values is the same as the number of Y- values. ​