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There are many practice problems on this website. You can actually click and try to do the problems. There are instructions on the top of the page to inform how to use the website.

Does a step by step process how to do the quadratic formula one of the three ways to do quadratics

Shows basic examples of how to understand and do rational functions,

Shows how to do both normal and special logs such as the natural log ln(

This site gives you all the steps to graph a rational function and even gives you practice problems.

This is a great website for learning about the graphs of rational functions. Shows you everything from the horizontal and vertical asymptote to the intercepts. It sketches it all out for you which makes it ten times easier.