Wolfram Research
Wolfram Mathworld: Inequality
This site provides a brief overview of inequality. Content includes a definition and several examples using graphical images. (Absolute value graphs are used in this site.)
Oswego City School District
Regents Exam Prep Center: Linear Inequalities
A complete review of linear inequalities interval notation, and compound inequalities. Several applications of the compound inequalities are given along with solutions and explanations. Links to sites assisting with graphing calculator...