# Chapter 12: Rational Equations and Functions; Statistics

Difficulty Level:

**At Grade**Created by: CK-12

The final chapter of this text introduces the concept of **rational functions,** that is, equations in which the variable appears in the denominator of a fraction. A common rational function in the **inverse variation model,** similar to the direct variation model you studied in chapter 4 lesson 6. We finish the chapter with solving rational equations and using graphical representations to display data.

Chapter Outline

- 12.1.
## Inverse Variation Models

- 12.2.
## Graphs of Rational Functions

- 12.3.
## Division of Polynomials

- 12.4.
## Rational Expressions

- 12.5.
## Multiplication and Division of Rational Expressions

- 12.6.
## Addition and Subtraction of Rational Expressions

- 12.7.
## Solution of Rational Equations

- 12.8.
## Surveys and Samples

- 12.9.
## Chapter 12 Review

- 12.10.
## Chapter 12 Test

### Chapter Summary

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Description

This chapter covers rational functions and the operations of rational expressions. Students learn to graph rational functions, divide polynomials, and analyze surveys and samples.

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Date Created:

Feb 22, 2012
Last Modified:

Apr 29, 2014
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