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Some links are repeated for use with more than one lesson.

9.1  Inequalities and the Number Line

http://www.sparknotes.com/math/algebra1/inequalities/section4.rhtml
This page contains notes on how to graph inequalities on a number line.

http://www.mathsrevision.net/gcse/pages.php?page=27
This site explains inequalities and contains a section on how to graph them on a number line.

9.2  The Addition Property of Inequality

http://www.icoachmath.com/SiteMap/AdditionPropertyofEqualityandInequality.html
This page explains the addition property of equality and inequality and contains examples.

9.3  The Multiplication Property of Inequality

http://www.icoachmath.com/SiteMap/MultiplicativeProperty.html
This site explains the multiplication property of inequality and contains examples.

9.4  Solving Compound Inequalities

http://www.algebra-online.com/solving-compound-inequalities-1.htm
This page explains how to solve compound inequalities through examples.

http://www.math-videos-online.com/solve-compound-inequality.html
This page details how to solve compound inequalities and has a video.

9.5  Solving Absolute Value Inequalities

http://www.sosmath.com/algebra/inequalities/ineq03/ineq03.html
This site shows how to graph absolute value inequalities.

http://www.algebralab.org/lessons/lesson.aspx?file=Algebra_AbsoluteValueInequalities.xml
This page has notes on how to solve absolute value inequalities.

9.6  Graphing Linear Inequalities in Two Variables

http://www.algebralab.org/studyaids/studyaid.aspx?file=Algebra1_6-5.xml
This page explains how to graph linear inequalities with two variables.

9.7  Solving Systems of Inequalities

 http://www.purplemath.com/modules/syslneq.htm
This site explains how to solve systems of inequalities.

 http://www.freemathhelp.com/systems-inequalities.html
This page has notes and graphs explaining how to solve systems of inequalities.