# plotting an equation

• Jul 16th 2011, 11:31 PM
nimishak
plotting an equation
I usually have problem in plotting the equations, eg y=2ux/u-x (plotting y wrt x).
Can someone suggest a link where i can get a quick idea of how to do it? Thanks!
• Jul 17th 2011, 04:17 AM
skeeter
Re: plotting an equation
Quote:

Originally Posted by nimishak
I usually have problem in plotting the equations, eg y=2ux/u-x (plotting y wrt x).
Can someone suggest a link where i can get a quick idea of how to do it? Thanks!

what does "u" represent?
• Jul 17th 2011, 04:31 AM
nimishak
Re: plotting an equation
'u' is a constant.
• Jul 17th 2011, 04:48 AM
skeeter
Re: plotting an equation
Quote:

Originally Posted by nimishak
'u' is a constant.

what you have is a rational function of the form $y = \frac{ax}{b-x}$ where $\, a,b \,$ are both constants.

vertical asymptote $x = b$ and horizontal asymptote $y = -a$.

here is a link to a series of lessons about graphing rational functions ...

Graphing Rational Functions: Introduction