# Ch 2: The Basics of Functions

Go over the video lessons and check out how functions let you solve real world math problems. Gain a better understanding of key terms through reading lesson transcripts, and submit questions to instructors for additional help.

## The Basics of Functions - Chapter Summary and Learning Objectives

When you figure out the cost of gas in relationship to the amount of gallons purchased, you are using mathematical functions to find your answer. In simplest terms, a function is really nothing more than a mathematical rule or a particular type of equation you use to solve everyday problems. There are many different aspects to functions, though, and the video lessons in this chapter let you explore all the ins and outs, so you can solve a full range of mathematical equations. This chapter is designed to teach you about:

• Function basics
• The difference between domain and range
• The rules for composing functions
• Inverse functions

Video Objective
What is a Function: Basics and Key Terms Define dependent and independent variables, analyze the domain of a function, and interpret the range of a function.
Functions: Identification, Notation & Practice Problems Describe a function as a kind of equation, go over function notation, and practice the vertical line test to verify functions.
Transformations: How to Shift Graphs on a Plane Break down what transformations do to functions, determine the effects that reflections and rotations have on functions, and then investigate the impact that translations and dilations have on functions.
What Is Domain and Range in a Function? Decipher the concepts of inputs and outputs, establish graphing rules, and then figure out how to graph the domain and range.
How to Add, Subtract, Multiply and Divide Functions Distinguish how to use substitution and simplification to perform these mathematical procedures with functions.
How to Compose Functions Discover how to replace one function for another when composing, learn the steps for working your way through equations, and identify how to check your work.
Inverse Functions Explain the meaning and use of the following expression: f^-1(x), and then review the steps for the horizontal line test.
Applying Function Operations Practice Problems Develop sample problems that combine most of the major function-related terms discussed in the previous lessons.

8 Lessons in Chapter 2: The Basics of Functions
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

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