The Point is: We obtain parametric equations by setting one of the
coordinates equal to a function of a parameter, substituting for this
coordinate in the given rectangular equation, and solving for the other
coordinate in terms of the parameter. What don't you understand? It
makes me stupid trying to understand all of the other life forms, we
call people, on this god damned planet.

~The Apartment at the End of the Universe~
-Josher-