GraphNow Software provides math graphing softwares for school, college and university teachers and students. Just visit http://www.graphnow.com.
Thanks for the short advertising, graphnow, I will take a look at your product.
John, you could provide some more information about yourself on the website ... it looks very "impersonal".
But the screenshots and descriptions look good.
Dear MathsIsFun, thanks for your suggestion!
Did you know that the cartesian plane is named after Rene` Descartes?
Did you know what linear equations, quadratic equations and cubic, quartic and quintic equations are?
I haven't yet visited the website, I reserve my comments.
It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.