joshu1124 joshu1124 14-06-2017 Mathematics contestada Which of the following relations is a function? { (2, 6), (3, 9), (4, 2), (3, 6) } { (2, 8), (3, 6), (2, 4), (0, 2) } { (3, -2), (4, 7), (-2, 5), (-4, 5) } { (4, 7), (-2, 5), (1, 3), (-2, 1) }