I need a program that can graph multivariable functions.

[pray4mojo]

This is going to be for a calculus project that I need to present on Thursday. Just to let you know what I'm talking about let's say that I have the function f(x,y) = x^2 + y^2 and I took the derivative with respect to x about point (1,1). This would give me the tangent slope at the point with respect to x so that I also have a line...blah blah. So I would need a program that can graph that function and the line. Can anyone help?

EDIT: preferably free cause im a cheap high school student that got owned by prom.

 

[RaynorWolfcastle]

maple or mathematica should work

 

[pray4mojo]

Originally posted by: RaynorWolfcastle
maple or mathematica should work

any of those freeware?

 

[cirthix]

y not analytically?
f'=2x+2y,
f'(1,1)=4

point slope form: y-y0=m(x-x0)
so the tangent line at (1,1) is y=4x-3





hehehe, y not... y0

 

[jagec]

Originally posted by: pray4mojo

Originally posted by: RaynorWolfcastle
maple or mathematica should work

any of those freeware?

hahahahaha....

 

[dug777]

Microfit IIRC

 

[pray4mojo]

bump for more alternatives?