What is a parametric curve? x(t)=t3 y(t)=t

If x and y are continuous functions of t on any interval I , then the equations: $x=x(t)andy=y(t)$ are called parametric equations and t is called the parameter. The set of points (x,y) obtained as t varies over the interval I is called the graph of the parametric equations. The graph of parametric equations is called a parametric curve or plane curve. $x(t)=t3$
$y(t)=t$