index.html

<doctype !html>
<script src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
<script src="https://raw.github.com/mbostock/d3/master/d3.v2.min.js"></script>
<script src="https://raw.github.com/shutterstock/rickshaw/master/rickshaw.min.js"></script>

<div id="chart"></div> 
 
<script> 
 
var graph = new Rickshaw.Graph( {
    element: document.querySelector("#chart"), 
    width: 300, 
    height: 200, 
    series: [{
        color: 'steelblue',
        data: [ 
            { x: 0, y: 40 }, 
            { x: 1, y: 49 }, 
            { x: 2, y: 38 }, 
            { x: 3, y: 30 }, 
            { x: 4, y: 32 } ]
    }]
});
 
graph.render();
 
</script> 

Could you please fix the broken link to d3.js, using http://d3js.org/d3.v2.min.js ?