Kevin Donnelly
No, he's already done the coursework, which involved plotting actual results by hand - he's in year 4 secondary, so least squares would be a bit beyond them!
He can add one or more artificial points and handle the problem as an interpolation. He can place them outside the visible axis range to make them "invisible".
He can just extrapolate the curve manually on the graph paper, but I thought there might be something that could do that more neatly.
There are many software packages which can fit a curve (based on an appropriate mathematical model) to a set of data points (http://root.cern.ch/, http://www.r-project.org/, ...) but they are written for scientists or statisticians ... -- A.M. -- Check the headers for your unsubscription address For additional commands send e-mail to suse-linux-e-help@suse.com Also check the archives at http://lists.suse.com Please read the FAQs: suse-linux-e-faq@suse.com