Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsRational Function Graphshttp://demonstrations.wolfram.com/RationalFunctionGraphs/]]>http://demonstrations.wolfram.com/RationalFunctionGraphs/Area Function for a Piecewise Curvehttp://demonstrations.wolfram.com/AreaFunctionForAPiecewiseCurve/]]>http://demonstrations.wolfram.com/AreaFunctionForAPiecewiseCurve/