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Scatter plot with slider
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<iframe 
    src="http://jsxgraph.org/share/iframe/scatter-plot-with-slider" 
    style="border: 1px solid black; overflow: hidden; width: 550px; aspect-ratio: 55 / 65;" 
    name="JSXGraph example: Scatter plot with slider" 
    allowfullscreen
></iframe>
This code has to 
<div id="board-0-wrapper" class="jxgbox-wrapper " style="width: 100%; ">
   <div id="board-0" class="jxgbox" style="aspect-ratio: 1 / 1; width: 100%;" data-ar="1 / 1"></div>
</div>

<script type = "text/javascript"> 
    /*
    This example is licensed under a 
    Creative Commons Attribution ShareAlike 4.0 International License.
    https://creativecommons.org/licenses/by-sa/4.0/
    
    Please note you have to mention 
    The Center of Mobile Learning with Digital Technology
    in the credits.
    */
    
    const BOARDID = 'board-0';

    const board = JXG.JSXGraph.initBoard(BOARDID, {
        boundingbox: [-5, 5, 5, -5], axis: true, keepaspectratio: true
    });
    
    var slider = board.create('slider', [[-3, 4.5], [3, 4.5], [0, 3, 5]]);
    var scatterplot = board.create('curve', [[], []], { strokeWidth: 3, lineCap: 'round' });
    
    scatterplot.updateDataArray = function() {
              var i,
            s = slider.Value();
    
        this.dataX = [];
        this.dataY = [];
        for (i = 0; i < 1000; i++) {
            var x = Math.random() * 8 - 4;
            var y = Math.random() * s * 2 - s;
            this.dataX.push(x, x, NaN);
            this.dataY.push(y, y, NaN);
        }
    };
    
    board.update();
 </script> 
/*
This example is licensed under a 
Creative Commons Attribution ShareAlike 4.0 International License.
https://creativecommons.org/licenses/by-sa/4.0/

Please note you have to mention 
The Center of Mobile Learning with Digital Technology
in the credits.
*/

const BOARDID = 'your_div_id'; // Insert your id here!

const board = JXG.JSXGraph.initBoard(BOARDID, {
    boundingbox: [-5, 5, 5, -5], axis: true, keepaspectratio: true
});

var slider = board.create('slider', [[-3, 4.5], [3, 4.5], [0, 3, 5]]);
var scatterplot = board.create('curve', [[], []], { strokeWidth: 3, lineCap: 'round' });

scatterplot.updateDataArray = function() {
          var i,
        s = slider.Value();

    this.dataX = [];
    this.dataY = [];
    for (i = 0; i < 1000; i++) {
        var x = Math.random() * 8 - 4;
        var y = Math.random() * s * 2 - s;
        this.dataX.push(x, x, NaN);
        this.dataY.push(y, y, NaN);
    }
};

board.update();
<jsxgraph width="100%" aspect-ratio="1 / 1" title="Scatter plot with slider" description="This construction was copied from JSXGraph examples database: BTW HERE SHOULD BE A GENERATED LINKuseGlobalJS="false">
   /*
   This example is licensed under a 
   Creative Commons Attribution ShareAlike 4.0 International License.
   https://creativecommons.org/licenses/by-sa/4.0/
   
   Please note you have to mention 
   The Center of Mobile Learning with Digital Technology
   in the credits.
   */
   
   const board = JXG.JSXGraph.initBoard(BOARDID, {
       boundingbox: [-5, 5, 5, -5], axis: true, keepaspectratio: true
   });
   
   var slider = board.create('slider', [[-3, 4.5], [3, 4.5], [0, 3, 5]]);
   var scatterplot = board.create('curve', [[], []], { strokeWidth: 3, lineCap: 'round' });
   
   scatterplot.updateDataArray = function() {
             var i,
           s = slider.Value();
   
       this.dataX = [];
       this.dataY = [];
       for (i = 0; i < 1000; i++) {
           var x = Math.random() * 8 - 4;
           var y = Math.random() * s * 2 - s;
           this.dataX.push(x, x, NaN);
           this.dataY.push(y, y, NaN);
       }
   };
   
   board.update();
</jsxgraph>
Here is a dynamic scatter plot whose value depend on a slider.
// Define the id of your board in BOARDID

const board = JXG.JSXGraph.initBoard(BOARDID, {
    boundingbox: [-5, 5, 5, -5], axis: true, keepaspectratio: true
});

var slider = board.create('slider', [[-3, 4.5], [3, 4.5], [0, 3, 5]]);
var scatterplot = board.create('curve', [[], []], { strokeWidth: 3, lineCap: 'round' });

scatterplot.updateDataArray = function() {
          var i,
        s = slider.Value();

    this.dataX = [];
    this.dataY = [];
    for (i = 0; i < 1000; i++) {
        var x = Math.random() * 8 - 4;
        var y = Math.random() * s * 2 - s;
        this.dataX.push(x, x, NaN);
        this.dataY.push(y, y, NaN);
    }
};

board.update();

license

This example is licensed under a Creative Commons Attribution ShareAlike 4.0 International License.
Please note you have to mention The Center of Mobile Learning with Digital Technology in the credits.