Code for Linear Scale

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Creating HTML Elements from Data</title>
		<script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
            
			
			body {
				background-color: #ddddff;
			}

svg {
				background-color: white;
			}

</style>
	</head>
	<body>

var w =300;
            var h = 400;
            
            var widthScale = d3.scale.linear()
            .range ([0,w]);
            
        
			var svg = d3.select("body")
						.append("svg")
						.attr("width", w)
						.attr("height", h);

d3.csv("HardshipChicago.csv", function(data) {
                
                data.sort(function(a,b) {
                    return d3.descending (+a.Hardship_Index, +b.Hardship_Index);
                });
                
                widthscale.domain([0,d3.max(data, function(d) {
                    return +d.Hardship_Index;
                }) ]);
                
			var rects =	svg.selectAll("rect")
					.data(data)
					.enter()
					.append("rect")
            
            rects.attr("x",0)
					.attr("y", function(d, i) {
						return i * 10;
					})
					.attr("width", function(d) {
						return widthScale(d.Hardship_Index);
					})
					.attr("height", 8)
                    .append ("title")
                    .text(function(d) {
                    return d.community + "'s Hardship Index Score is" +d.Hardship_Index;
                });
			});

</script>

</body>
</html>

Modified http://d3js.org/d3.v3.js to a secure url

https://d3js.org/d3.v3.js