I suggest you examine our online qsf examples
, our sdk samples
(you can install the sdk browser
for a nice browsing experience) and our online documentation
Yes, this does seem to be a scatter scenario, so you can use a scatter series (with two numerical axes) and if you have lots of data - you can use one of our lighter render modes
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos
and start improving your app based on facts, not hunches.