An adjustable Line chart with only one adjustable point

[No canvas support]

This goes in the documents header: 
<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.dynamic.js"></script>
<script src="RGraph.line.js"></script>
Put this where you want the chart to show up: 
<canvas id="cvs" width="600" height="250">[No canvas support]</canvas><br />
<button style="padding: 5px; font-size: 16pt" onclick="line.set('outofboundsClip', !line.get('outofboundsClip')); RGraph.redraw()">Toggle the outofboundsClip option</button>
This is the code that generates the chart: