Double click the trendline, open the Options tab and set an appropriate
value in the Backward box
best wishes

--
Bernard V Liengme
www.stfx.ca/people/bliengme
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"becca26387" wrote in message
...
I am using Excel 2003 and have produced an xy graph giving a positive
correlation. I added a linear trendline to the chart, and want to extend
the
trendline back to the y axis, but am unsure how to do so. Any help
appreciated :)