I would like to create an application that shows the history of disk usage.
I have already create a backend for geting data and now I would like to show this data in a line chart like this:

As you can see, I get date (DateTime) and usage (int) foreach disk.
My question:
Which silverlight component/tools should I use, to show the charts?
I’m looking for a free solution that is easy to understand/use.
There are a few options: