--- loncom/homework/templates/functionplotback.problem	2010/11/13 22:30:32	1.1
+++ loncom/homework/templates/functionplotback.problem	2010/11/24 02:53:18	1.2
@@ -4,14 +4,16 @@ $y=&random(-3,3,2);
 $a=&random(0.5,0.9,0.1);
 if (&random(0,1,1)) {
    $function="$a*(x-($x))^2+($y)";
+   $answer="2*$a*(x-($x))";
    $relation='gt';
 } else {
    $function="-$a*(x-($x))^2+($y)";
+   $answer="-2*$a*(x-($x))";
    $relation='lt';
 }</script>
 <startouttext />
 Provide a sketch of the derivative of the indicated function<br /> <endouttext />
-<functionplotresponse xaxisvisible="yes" xlabel="x" gridvisible="yes" ylabel="y(x)" id="11" xmax="10" yaxisvisible="yes" xmin="-10" ymin="-10" ymax="10">
+<functionplotresponse xaxisvisible="yes" xlabel="x" gridvisible="yes" ylabel="y(x)" id="11" xmax="10" yaxisvisible="yes" xmin="-10" ymin="-10" ymax="10" answerdisplay="$answer">
 <functionplotelements>
 <spline initx="-4" inity="0" index="A" order="3" scalex="8" />
 <backgroundplot function="$function" fixed="yes" />