Is this relation a function? Justify your answer. 10 8 o o у тоо 6 4 3 Nw 2 1 1 2 3 4 5 6 7 8 9 10 A. No, because two points with the same y value have different x- values. B. Yes, because the number of x-values is the same as the number of y-values. O C. Yes, because every x- and y-value is positive. O D. No, because two points with the same x-value have different y values.