On Sat, 13 Jun 2009 21:09:11 -0700 (PDT), Herbert Seidenberg
wrote:

Excel 2007
Inserted your data into my tables.
A second order rate equation with offset
still gives the best fit.
See Sheet2/Chart2.
http://www.mediafire.com/file/kn4jey...06_12_09b.xlsx


That is the exact same curve I got, except mine was over 11 days (0
through 10) and yours is 80 days in ten day increments. Same exact plot
though.