The focus of the parabola  is and parabola opens left.

Parabola contains the point .

Parabola opens left means that it is a horizontal parabola.

Standard form of the horizontal parabola is .

where vertex : and focus : .

Here .

Substitute and in standard form.

and .

Since 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 :

The standard form of the equation is .

Graph of :

.