Draw a function!

[leprechaun]

I thought about the above said a little more and an other question came up I would like to ask.

Tim, you guys at HP seem to do a lot of meetings and discussions with so-called experts in both business and education. I don't envy you.
Most decisions have to be based on economical considerations and educational ideas. I think of the function app again.
I am no teacher but have some experience with kids having problems. If I leave math class and join physics class: you can enter an equation in the app having 'X' to be the independant variable. However in physics it is very much more likely to have, say 't' in the texbook. Not even 'T' but 't'. The student has to understand and the student must be able to replace the needed variable with 'X'... That is not as easy as it sounds for some. You cannot compare the entered equation with what is shown in the textbook. It looks different.
It is easier to enter the equation as seen and tell the app, hey 't' varies in that equation I define 't' in the indep-field. (If different from 'X' one cpuled easily keep 'X' as default all over the place for math-class convenience)

On purpose I am not talking about smooth and nice interaction of cas and app or what people sometimes complained. Although a plotfunc() command behind the function app which defaults to 'X' and could be used and make cas integration easier.

Thanks a lot! I like to learn about what you think and your priorisation of todo tasks.