Difference between revisions of "The Multiplication Parabola"
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===The underlying JavaScript code=== | ===The underlying JavaScript code=== | ||
<source lang="xml"> | <source lang="xml"> | ||
| − | </jsxgraph></source> | + | <jsxgraph width="400" height="600" box="box"> |
| + | var brd = JXG.JSXGraph.initBoard('box', {axis:true, originX: 200, originY: 550, grid:true, unitX: 50, unitY: 50}); | ||
| + | var f = brd.createElement('functiongraph',[function(x){return x*x;}],{strokeColor:'black',highlightStrokeColor:'black'}); | ||
| + | var a = brd.createElement('glider',[-2,4,f]); | ||
| + | var b = brd.createElement('glider',[3,9,f]); | ||
| + | var g = brd.createElement('line',[a,b],{straightFirst:false,straightLast:false}); | ||
| + | var p = brd.createElement('point',[function(){return 0.0;},function(){return -a.X()*b.X();}],{fixed:true}); | ||
| + | var t = brd.createElement('text',[-1.5,9,function(){ return '-X(A)*X(B) = '+a.X().toFixed(2)+'*'+b.X().toFixed(2)+' = '+(-a.X()*b.X()).toFixed(2)+' = Y(C)';}]); | ||
| + | </jsxgraph> | ||
| + | </source> | ||
[[Category:Examples]] | [[Category:Examples]] | ||
Revision as of 14:58, 19 June 2009
The underlying JavaScript code
<jsxgraph width="400" height="600" box="box">
var brd = JXG.JSXGraph.initBoard('box', {axis:true, originX: 200, originY: 550, grid:true, unitX: 50, unitY: 50});
var f = brd.createElement('functiongraph',[function(x){return x*x;}],{strokeColor:'black',highlightStrokeColor:'black'});
var a = brd.createElement('glider',[-2,4,f]);
var b = brd.createElement('glider',[3,9,f]);
var g = brd.createElement('line',[a,b],{straightFirst:false,straightLast:false});
var p = brd.createElement('point',[function(){return 0.0;},function(){return -a.X()*b.X();}],{fixed:true});
var t = brd.createElement('text',[-1.5,9,function(){ return '-X(A)*X(B) = '+a.X().toFixed(2)+'*'+b.X().toFixed(2)+' = '+(-a.X()*b.X()).toFixed(2)+' = Y(C)';}]);
</jsxgraph>
