Lesson 1
1. Lesson 1
1.7. Explore 3
Module 7: Absolute Value and Reciprocal Functions
Vertical bars are used to indicate the absolute value of a number or expression. The vertical bars are known as the absolute value symbol. The following table shows how you can use the absolute value symbol to represent the numbers in Try This 2.
| Description | Representation |
| absolute value of 3 |  |
| absolute value of −3 |  |
| absolute value of a |  |
| absolute value of −a |  |
You can also evaluate the absolute value of an expression.
A good strategy when simplifying absolute value expressions is to first evaluate the expression inside the absolute value symbol.
Try This 3
- Evaluate the following expressions. For each one, record any strategies you may have used to determine the answer.
Expression Simplification Strategies/Notes a. 
b. 
c. 
- Turn to “Example 3” on page 361 of your textbook. The questions in this example are the same as those in the table for question 1. Compare your answers to those in the textbook. If there are any discrepancies, note them, and then make any necessary revisions to your own work.
Save your responses in your course folder.