# Introduction: Models and Applicaitons

### Learning Objectives

By the end of this section, you will be able to:- Set up a linear equation to solve a real-world application.
- Use a formula to solve a real-world application.

**Figure 1.**Credit: Kevin Dooley

*x*widgets per month plus monthly operating charges; a car rental company charges a daily fee plus an amount per mile driven. These are examples of applications we come across every day that are modeled by linear equations. In this section, we will set up and use linear equations to solve such problems.

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- College Algebra.
**Provided by:**OpenStax**Authored by:**OpenStax College Algebra.**Located at:**https://cnx.org/contents/[email protected]:1/Preface.**License:**CC BY: Attribution.