The parabola is
.
Rewrite the parabola as
.
Compare the above equation with
.
and
.
Here
is positive then the parabola opens upward.
The vertex of the parabola is
.
The focus of the parabola is
.
The directrix of the parabola is
.
Graph :
\Draw a coordinate plane.
\Plot the vertex and focus of the parabola.
\Draw the directix
.
Graph the parabola
.

Graph of the parabola
is :
