The focus of the parabola is
and parabola opens left.
Parabola contains
.
Parabola opens left means that it is a horizontal parabola.
\Standard form of the horizontal parabola is
.
Where
\Vertex :
,
Focus :
.
Here 

Substitute
and
in standard form.


and
.
As the parabola opens left,
.
Therefore,
.

.
Vertex of parabola :
.
Axis of symmetry :
.
Axis of symmetry :
.
Directrix :
.
Directrix :
.
Write the equation for the parabola in standard form using the values of
, and
.
Standard form of the vertical parabola is
.
Substitute the values of
,
and
in standard form.

Therefore, the standard form of the equation is
.
Graph :
\Graph the vertex and focus.
\Graph of
, axis of symmetry
and directrix
.
The standard form of the equation is
.
Graph of
:
.