Plot each month's worth of data as its own series, then apply a trendline to
each series.

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
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"Rosemary" wrote in message
...
I have data from 1/1/08 thru 8/10/08 - how do i set a trending line for
each
month of data to be shown only for the monthly period