# Question #e9a06

##### 1 Answer

Sep 23, 2017

#### Answer:

Let f = x. That will make it simpler. A "number line" as opposed to a Cartesian Plane is usually the "x-axis".

#### Explanation:

It could be "y" too.. the labels are just conventions, they are not absolute, but it does help to use the conventions so everyone has the same perspective.

As an "x" value, the inequality *right* of it shaded.

The inequality *left* of it shaded.