There is a Chart helper, which works quite well with Razor and enables you to build charts, histograms and other graphical representations of your data quite easily.
Or you could try to use some jQuery/HTML5/Javascript library:
Highcharts is a charting library written in pure HTML5/JavaScript, offering intuitive, interactive charts to your web site or web application.
jqPlot is a plotting and charting plugin for the jQuery Javascript framework.
Raphaël is a small JavaScript library that should simplify your work with vector graphics on the web.
There are more of them, the above ones are only some examples;
