### Functions!

Well we started off the new year with a new unit. FUNCTIONS!

A function is a rule that puts in an input and give only **1** output. You can determine its a function by doing a verticle test line, and if it touches the graph just **once, **then it is a function.

All functions are relations, but not all relations are functions.

An example of a relation, that is a function is:

An example of a relation, that is **not** a function is:

When Adding or Multipyling functions, order in which you put them in **doesn't** matter, this is called the **Commutative Law.**

When Subtracting or Dividing, order in which you put them in **does** matter because it can result in different answers.

With that said if you are given 2 elemenatary functions:

Adding them:

Subtracting them:

Mulitplying them:

Dividing them:

Well this is all I got for now, if there is anything missing or something is wrong, please feel free to correct me. It's the beginning of coming back from 2 weeks off, so there's probably more things missing then usual. (hehe..)

The next scribe is Abdi

## 1 Comments:

cool scribe post the graphics are awesome

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