The parabola is .
The intercepts of parabola is
.
The equation of parabola is .
The vertex of parabola is .
Substitute and
in
.
Substitute in
.
.
The graph of the function is .
The function is a cubic polynomial of the form
.
Consider point on the curve .
Substitute and
in
.
Substitute in
.
.
Graph :
\Graph the parametric equations and
.
Indicate the direction of the parametric curve.
\Observe the graph :
\The value of increases, the value of
increases.
Graph of the parametric curve and direction is
\.