Graph trendlines - a question.

["Gareth.J.Martin" <eclipsing binary virgin net>]

Hello,
     I've only recently started using Gnumeric (Windows, v1.7.10) and 
have found it to be a brilliant programme to use. I frequently use it to 
analyse river flow data. The first time I applied a power law trend to 
some plotted data the equation that I was presented with was not what 
I've learnt is power law (in the form a=bQ^c). My Maths isn't too 
brilliant but I was just wondering if I was at fault (morelikely!) or 
this is something to do with Gnumeric. I've searched the manuals but can 
find no mention of this. Thanks for any help and assistance you can offer.

Best wishes,
Gareth.