Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsQuadratic in Vertex Form (or Turning Point Form)http://demonstrations.wolfram.com/QuadraticInVertexFormOrTurningPointForm/]]>http://demonstrations.wolfram.com/QuadraticInVertexFormOrTurningPointForm/