Draw a function!

[leprechaun]

Thanks for the information! From that point it is understandable. Does ti and casio offer such a concept? [/quote]
I did not think of lower grade students. The first thing that came to mind was: well I have a mathematical model it is somehow dictated by physics-I know about the function. If I have no model in mind how cool would it be If the calc was smarter than me... But a dumb calculator Will never be smarter than the human.

I am still not used to expect low grades buying such powerful and expensive calculators...

Edit: i would have gone made in a test if People had calculators with voice recognition. ;-)