In this week of math 10 we learned about functions and relations.

A function is a special type of relation where every x value goes with one y value. There cannot be a multiple of the same x value. every x value is unique

This is an example of a relation that is a function because every x value is unique and goes with one y value. (functions are vertical lines)

An example of a relation that is not a function is when there are 2 x values that are the same but they go to 2 different y values. This is not a function because the domain then has 2 different possibilities of what the range can be. (Relations a not vertical)

Here is an example of a relation that is not a function.

All functions are relations but not all relations are functions