Requirement: Need to produce a chart with trendlines

My app (ASP.Net based) needs to produce sales charts in either line or bar chart format. I guess this is easy but what I want is one that can super impose trend lines. Anyone got a library that can do this?


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How to produce a bar chart with a trend line in ASP.Net
The csASPNetGraph component is used to generate the image of a bar graph with a trend line.
(VB.NET\ASP.NET)
Advanced Graph and Chart Collection
All the chart styles in this package contain the ability to add both Trend and Target to the chart. The package includes Line and Bar graphs. For full details see:- http://www.jpowered.com/graph_chart_collection/index.htm The following is the direct link to the relevant section of the documentation for Target and Trend lines:- http://www.jpowered.com/graph_chart_collection/documentation/line-graph-parameters.htm#target
(ASP, PHP, Java\Platform Independent)