Which relation is a function? A. (0, - 45), (-45, - 13), (18, - 45) B. (33, - 11), (23, 18), (23, - 9) C. (8, 48), (8, 55), (9, 60) D. (-13, 30), (30, 19), (-13, 39)

Its a function is a relation that has one x for every y there can be the same ys for different xs but there cant be more then one of the same xs like 0/45 0-45 is a relation not a function but 0/45 1/45 is a relation and a function

C because you cant have the same x values