samuelpereirawpb samuelpereirawpb 30-11-2020 Mathematics contestada Select all the relations that represent a function. a.(2,3) (4,3) (6, 2) (5,7) b.(2,3) (4,9) (6, 2) (5,7) c.(5,4) (5, 7) (2,7) (3,5) d..(4,8) (7,5) (8,4) (5,7)