title: Link excel data point by hyperlink
body: <p>I have a graph with several data series on it, and in each series several points. I want to click on one point and have a jpeg or text file open. 
  Is it possible to hyperlink a data point on a excel graph to a file outside the workbook? 
  I know I can hyperlink the entire chart to another file but is it possible to link just one point to a file ? And can I do this for different points on the one graph, having them each link to different files?</p>