Which ordered pair could be removed so that the resulting graph represents a function

One of this ordered pairs: should be removed

Step-by-step explanation:

A relation f is said to be a function if for each and every element of it's domain there exists a unique image in it's codomain.

As per the graph, ordered pairs are

Here,  all the ordered pairs have unique image except

Here , element 1 of domain has two images 3 and - 2 .

We know that as per definition for each and every element of the domain there should be a unique image in the codomain.

So, one of this ordered pairs: should be removed in order to make it a function.