This tutorial will explore functions.

## Functions

A function is a mathematical machine that relates an output (y) to an input (x). Functions are usually written with f(x) as opposed to “y”.

The x values are referred to as the Domain.

The y values are referred to as the Range.

## Functions in Tables

Functions in tables have no repeating x’s.

## Functions in Mapping

Each x value has one arrow each pointing to the y’s.

## Functions in Graphs

Graphs should only touch a vertical line one time.

## Functions in Ordered Pairs

Ordered pairs will not have any repeating x’s.

## Watch a Video Tutorial

Here is a video tutorial comparing fractions.

## Interactive Class on this Topic

Take an interactive middle school math class on this material, click here