This week I learned how to write in Function Notation, instead of Set Notation, which is much longer. Function notation is supposed to make it much easier to write information on your graph down, quickly. Mathematician like to use different brackets to show us information, such as:

() = not included. The two round brackets sort of look like a hollow dot, which on a graph also means not included.

[ ] = Included

Here’s an example of Set notation, and Ill show you how to convert it to Function notation.

Set:

Function:

Thats it!