chikinmumby chikinmumby 22-10-2020 Mathematics contestada Which relation is a function? {(1, 2); (2, 3); (3, 4); (1, 5)} {(1, 2); (1, 3); (3, 2); (4, 2)} {(1, 2); (2, 5); (3, 2); (4, 5)} {(1, 2); (2, 3); (3, 4); (2, 5)}