Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsLogic on the Number Linehttp://demonstrations.wolfram.com/LogicOnTheNumberLine/]]>http://demonstrations.wolfram.com/LogicOnTheNumberLine/Number Line Solutions to Absolute Value Equations and Inequalitieshttp://demonstrations.wolfram.com/NumberLineSolutionsToAbsoluteValueEquationsAndInequalities/]]>http://demonstrations.wolfram.com/NumberLineSolutionsToAbsoluteValueEquationsAndInequalities/