# Question #e6694

##### 1 Answer

Sep 23, 2017

**C. **

#### Explanation:

To know which relation is a function, make sure you know that a function means **each input has exactly one output.** If a relation has an input with two outputs, then it is not considered a function.

Let's consider all the choices.

A) has **not a function.**

B) has **Still not a function.**

C) has **it is a function!**

D) has **Not a function.**

And the relation that shows a function would be the one on letter *C.*