Did you try to fit an exponential trendline to the data? The icon shows
exponential growth but the formula can just as well be fitted to exponential
decay.


Advanced Excel Conference - June 17-18 2009 - Charting and Programming
http://peltiertech.com/Training/2009...00906ACNJ.html

- Jon
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Jon Peltier, Peltier Technical Services, Inc.
http://PeltierTech.com/WordPress/
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wrote in message
...
I have a number of data points that appear to fit a negative
exponential model. When I graph the data in Excel that is how it
looks. However, the trends that Excel allows do not appear to fit
negative functions. Can someone tell me how to modify the trend
fitting capability of Excel to handle this data.

Please post detailed steps. I am looking a cancer data that I need to
model and display.

Thanks,

oldman