Section 2.2: Absolute Value Functions, from College Algebra: Corrected Edition by Carl Stitz, Ph.D. and
Jeff Zeager, Ph.D. is available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0
license. 2013, Carl Stitz.
2.2 Absolute Value Functio
Part A: Sets of Numbers
SETS OF NUMBERS
A set is a well-defined collection of objects which are called the
elements of the set. The order of the elements do not matter.
Well-defined means that it is possible to determine if something
Lines and Linear Functions
LINE IN PLANE
Recall from Geometry that two distinct points in the
plane determine a unique line containing those
To give a sense of the steepness of the line, we
recall we can compute the slope of the l