Section 8.1
You will learn about compound interest and use patterns of growth to write expressions.  You will analyze the patterns in tables, graphs, and expressions to compare linear and exponential growth.  
Section 8.2
You will learn new ways to rewrite numbers and expressions involving exponents.  You will also learn how to perform operations with these numbers and expressions.
Section 8.3
This section is devoted to special relationships called functions.  You will learn how to distinguish functions from other relationships by examining their graphs and tables.  Finally, you will investigate a variety of functions and learn how to describe them completely.

Chapter 8 Student Learning Objectives
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On this page, you will find additional support and information relating to this chapter in Math 8. 
Here are extra practice problems by section, including examples: 
Chapter 8: Exponents and Functions
PDF Lesson 8.1.1 to 8.1.3: Simple and Compound Interest
PDF Lesson 8.2.1 to 8.2.4: Exponents and Scientific Notation