A parametric equation defines a set of quantities as functions of one or more independent variables called parameters. So it is common to call this parameter with the letter t.
Given the equation:
[tex]y=3x^{2}-29x+64[/tex]
Let's name t the parameter, then t = x, therefore:
[tex]y=3t^{2}-29t+64[/tex]
Finally the set can be written as follows:
[tex] \left \{ {{x=t} \atop {y=3t^{2}-29t+64}} \right. t \in R[/tex]
