# Question #e6694

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 $\left(6 , 5\right)$ and $\left(6 , 4\right)$. 6 has two outputs: 5 and 4. It's not a function.

B) has $\left(2 , 3\right)$ and $\left(2 , 5\right)$. 2 has two outputs: 3 and 5. Still not a function.

C) has $\left(8 , - 2\right) , \left(- 2 , 5\right) , \left(6 , 0\right)$. Each has their own inputs and outputs. Therefore, it is a function!

D) has $\left(- 5 , 9\right)$ and $\left(- 5 , 3\right)$. Not a function.

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