Determine which of the mapping diagrams represents a relation that is not a function.

answer a. is the first mapping
answer b. is the second mapping
answer c. is the third mapping
answer d. is the fourth mapping

Answer A. i.e. the first mapping

Step-by-step explanation:

We know that,

A function is a relation in which each and every element of X i.e. domain has a unique image in Y i.e. co-domain.

So, according to the options, we see that,

In the first mapping, element 2 is mapped to -3 and 5.

This means that the element 2 does not have a unique image.

So, this mapping cannot represent a function.

Hence, first mapping is not a function.