# Algebra 2 - First Edition

## Chapter 4: Functions

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

### 4.1 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
NEW 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

### 4.2 Function Operations

http://www.analyzemath.com/graphing_calculators/operations_on_functions.html
This page contains a calculator that will graph functions and the functions that result from performing operations on them.

### 4.3 Identity, Constant, and Inverse Functions

http://www.purplemath.com/modules/invrsfcn.htm
This page contains a full description of inverse functions, graphing them and the relationship between a function and its inverse.

http://www.themathpage.com/aPreCalc/inverse-functions.htm