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

Answer 1

I think the answer is (2,3)