Question

Which ordered pair could you remove from the relation {(–1, 0), (1, 3), (2, 2), (2, 3), (3, 1)} so that it becomes a function?
1) (1, 3) or (3, 1)
2) (1, 3) or (2, 3)
3) (2, 3) or (3, 1)
4) (2, 2) or (2, 3)

Answer 1

2) (1,3) or (2,3)