This video will tell you all about the function of functions.

Up Next:
Function Rules, Tables, and Graphs 
Up Next:
Relations and Functions 
Up Next:
Translations and Functions 
Up Next:
Graphing Square Root Functions 
Up Next:
Direct Variation 
Up Next:
Inverse Variation 
Up Next:
Graphing Absolute Value Equations 
Up Next:
Using the Multiplicative Inverse to Solve Equations