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File:  [LON-CAPA] / loncom / homework / templates / functionplotback.problem
Revision 1.2: download - view: text, annotated - select for diffs
Wed Nov 24 02:53:18 2010 UTC (14 years, 3 months ago) by www
Branches: MAIN
CVS tags: version_2_12_X, version_2_11_X, version_2_11_6_msu, version_2_11_6, version_2_11_5_msu, version_2_11_5, version_2_11_4_uiuc, version_2_11_4_msu, version_2_11_4, version_2_11_3_uiuc, version_2_11_3_msu, version_2_11_3, version_2_11_2_uiuc, version_2_11_2_msu, version_2_11_2_educog, version_2_11_2, version_2_11_1, version_2_11_0_RC3, version_2_11_0_RC2, version_2_11_0_RC1, version_2_11_0, loncapaMITrelate_1, loncapaMITrelate, language_hyphenation_merge, language_hyphenation, HEAD, BZ4492-merge, BZ4492-feature_horizontal_radioresponse, BZ4492-feature_Support_horizontal_radioresponse, BZ4492-Support_horizontal_radioresponse
Show answer functionality

    1: <problem>
    2: <script type="loncapa/perl">$x=&random(-5,5,2);
    3: $y=&random(-3,3,2);
    4: $a=&random(0.5,0.9,0.1);
    5: if (&random(0,1,1)) {
    6:    $function="$a*(x-($x))^2+($y)";
    7:    $answer="2*$a*(x-($x))";
    8:    $relation='gt';
    9: } else {
   10:    $function="-$a*(x-($x))^2+($y)";
   11:    $answer="-2*$a*(x-($x))";
   12:    $relation='lt';
   13: }</script>
   14: <startouttext />
   15: Provide a sketch of the derivative of the indicated function<br /> <endouttext />
   16: <functionplotresponse xaxisvisible="yes" xlabel="x" gridvisible="yes" ylabel="y(x)" id="11" xmax="10" yaxisvisible="yes" xmin="-10" ymin="-10" ymax="10" answerdisplay="$answer">
   17: <functionplotelements>
   18: <spline initx="-4" inity="0" index="A" order="3" scalex="8" />
   19: <backgroundplot function="$function" fixed="yes" />
   20: </functionplotelements>
   21: <functionplotruleset>
   22: <functionplotrule relationship="eq" xinitial="$x" value="0" derivativeorder="0" percenterror="2" index="extreme" />
   23: <functionplotrule relationship="$relation" xinitiallabel="start" xfinallabel="end" value="0" derivativeorder="1" percenterror="10" index="slope" />
   24: <functionplotrule relationship="eq" xinitiallabel="start" xfinallabel="end" value="0" derivativeorder="2" percenterror="50" index="linear" />
   25: </functionplotruleset>
   26: </functionplotresponse>
   27: </problem>
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