Chapter 1.1

Absolute value functions


What You'll Learn

Define absolute value as the distance between a number and zero on a number line
Evaluate absolute value expressions with positive, negative, and zero values
Express absolute value functions as piecewise functions using domain conditions
Determine breaking points by solving when the inside expression equals zero
Apply sign rules to convert negative outputs to positive using absolute value

What You'll Practice

1

Evaluating absolute values of integers, negatives, and nested expressions

2

Converting absolute value of linear expressions into two-piece piecewise functions

3

Converting absolute value of quadratic expressions into three-piece piecewise functions

4

Using test values to determine signs across different domain regions

Why This Matters

Absolute value functions are essential for modeling real-world situations involving distance, magnitude, and error. You'll use them in physics, engineering, and economics, and they're foundational for calculus concepts like limits and continuity.

This Unit Includes

4 Video lessons
Practice exercises

Skills

Absolute Value
Piecewise Functions
Number Line
Domain Analysis
Quadratic Expressions
Sign Rules
Function Notation
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