# Movable functiongraph

From JSXGraph Wiki

Jump to navigationJump to searchBy default, the function graph can not be dragged around. When we allow to the function graph to be movable by setting "fixed:false" we have to notify JSXGraph that the function graph depends on the two free points A and B.

This example shows that a functiongraph can be made movable.

It is produced by the following commands:

```
<div id="jxgbox" class="jxgbox" style="width:500px; height:200px;"></div>
<script type="text/javascript">
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-5, 2, 5, -2], axis: true});
var A = board.create('point', [1, 0], {name:'A'});
var B = board.create('point', [3, 1], {name:'B'});
var f = board.create('functiongraph', function(x) {
var ax = A.X(),
ay = A.Y(),
bx = B.X(),
by = B.Y(),
a = (by - ay) / ( (bx - ax) * (bx - ax) );
return a * (x - ax) * (x - ax) + ay;
}, {fixed: false});
f.addParents([A, B]);
</script>
```