iris98 iris98 31-05-2017 Mathematics contestada Which relation is a function? A. x y 4 -2 5 -3 6 -2 7 -3 B. x y 3 10 2 20 3 30 4 40 C. x y -5 2 -5 3 -10 4 -10 5 D. x y 10 15 20 25 8 30 20 35