www.purplemath.com/modules/grphrtnl.htm

Introduction to the basic terminology and concepts of graphing rational functions.

www.khanacademy.org/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/v/horizontal-vertical-asymptotes

If the denominator has a higher degree term than the numerator, the horizontal asymptote will be 0. ALWAYS. If the numerator has a higher degree term than the ...

www.khanacademy.org/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/v/another-rational-function-graph-example

I am assuming here that you are talking about oblique asymptotes of rational functions and not the oblique asymptotes of hyperbolas (which are not functions).

tutorial.math.lamar.edu/Classes/Alg/GraphRationalFcns.aspx

In this final section we need to discuss graphing rational functions. It's is probably best to start off with a fairly simple one that we can do without all that much ...

www.coolmath.com/algebra/23-graphing-rational-functions/05-graphing-rational-functions-all-parts-01

This algebra lesson shows how to put all the pieces together (x-intercept, y- intercept, vertical asymptotes, horizontal or slant asymptotes) and explains how to ...

www.coolmath.com/algebra/23-graphing-rational-functions

Advanced graphing Algebra lessons with lots of worked examples and practice problems. Very easy to understand!

www.varsitytutors.com/hotmath/hotmath_help/topics/graphing-rational-functions

The graphs of the rational functions can be difficult to draw. To sketch a graph of a rational function, you can start by finding the asymptotes and intercepts.