This is an html 5 app to explore rational functions of the form
$f(x)=\dfrac{a x+ b}{c x+d}$ and their transforms such as \( -f(x) , f(-x) , f(kx) \) ,.... Select a transformation that you wish to explore, enter values for the parameters a, b, c and d, click on 'enter' and analyze the transforms. You may zoom in and out to better understand the proporties of the hraph.