# Algebra 2 - 2nd Edition

## Chapter 3: Functions

Some links are repeated for use with more than one lesson.

### 3.1 Relations and Functions

http://www.purplemath.com/modules/fcns.htm
This page contains a tutorial and practice problems on determining if a relation is a function.

http://www.regentsprep.org/Regents/math/ALGEBRA/AP3/indexAP3.htm
This page contrasts relations and functions, and provides practice distinguishing between the two.

http://www.algebralab.org/studyaids/studyaid.aspx?file=Algebra1_12-1.xml

### 3.2 Operations with Functions

http://www.purplemath.com/modules/fcnops.htm

http://www.mathsisfun.com/sets/functions-composition.html

http://www.purplemath.com/modules/fcncomp.htm
This series of pages teaches about composition and decomposition of function with some practical word problem examples.

### 3.3 Identity, Constant, and Inverse Functions

http://www.purplemath.com/modules/invrsfcn.htm
This series of pages contains a full description of inverse functions, graphing them and the relationship between a function and its inverse. (Click Next)

http://www.themathpage.com/aPreCalc/inverse-functions.htm
This page contains an interactive lesson on inverse functions. Pass mouse over each colored area to reveal.

### 3.4 Special Functions

http://www.intmath.com/Functions-and-graphs/Functions-graphs-intro.php
This page contains lessons, history, and applications of different types of functions.

http://www.mathsisfun.com/sets/functions-piecewise.html

This site devotes a couple pages to discussing piecewise functions and their graphs.

### 3.5 Transformations of Functions

http://www.regentsprep.org/regents/math/algtrig/ATP9/indexATP9.htm