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
\
.