\label{Function_Plot_Response_Background_Plot}
``Function'' - Enter the function here.  An equals sign is not necessary.  Just give the right hand side of the function.  LON-CAPA variables are usable as well to allow individualized problems for each student.  The syntax must be syntax recognized by GeoGebra.  To test syntax for Geogebra directly, visit http://www.geogebra.org/webstart/geogebra.html .

``Initial x-value'' and ``Final x-value'' - The function does not need to span the entire graph.  It is possible to create a piecewise function by defining the x-values over which each function is to be shown.

``Label on Plot'' - To label the background function (for example, as ``parabola''), enter it here.

``Color'' - To change the color of the background function, enter the hex code for that color here.  The default is 000000 (black).  It is recommended to choose a color other than green, since it is easily confused with being the answer.