# Ch 9: Functions Overview

Watch the following video lessons and learn about the basic facts of functions. Gauge your understanding of functions with self-assessment quizzes that accompany each lesson.

## Functions Overview - Chapter Summary and Learning Objectives

In the lessons in this chapter, you'll get a basic understanding of what a function is. You'll learn about domain and range, graphing basic functions and transformations. Other lessons cover piecewise functions and discontinuities in functions and graphs. Practice problems will allow you to assess your knowledge. At the end of this chapter you should be able to:

• Understand the basic principles of functions and define important terms
• Graph basic, power, piecewise and radical functions
• Define domain and range in functions
• Shift graphs on a plane
• Find the domain of a piecewise function

Video Objective
What is a Function: Basics and Key Terms Learn facts and important terms in relation to functions
Functions: Identification, Notation and Practice Problems Learn to identify and write equations for functions and practice these skills
Graphing Basic Functions Learn to graph basic functions
What is Domain and Range in a Function Identify and understand domain and range.
What is a Power Function: Equations and Graphs Write and graph power functions.
What is a Radical Function: Equations and Graphs Graph square root and cube root functions.
Discontinuities in Functions and Graphs Learn to identify graph discontinuities.
How to Graph Piecewise Functions Learn to graph piecewise functions.
How to Find the Domain of Piecewise Functions Learn to determine the domain of a piecewise function.
Transformations: How to Shift Graphs on a Plane Learn the methods to change functions.

12 Lessons in Chapter 9: Functions Overview
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

### Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.