Now let's look at several graphs of this form:

 

 

Can you predict the equations from the graphs? Let's see if you're right:

 

 

Now of course once you see the pattern, you can clean up the equations a little bit:

 

 

You may notice I have the vertices marked on each graph. Can you predict the vertices from the above equations? Let's see if you're right...

 

 

You can input these vertices in Graphing Calculator 3.5 using the parametric form: