# Is the relation #{(1, 1), (-1, 1), (2, 4), (-2, 4)}# a function?

##### 1 Answer

Jun 13, 2015

Yes. It is a function.

#### Explanation:

A relation fails to be a function if and only if there are 2 pairs with the same

That c is not happen in your question, do it is a function.

(It us not a one-to-one function.)