The focus of the parabola is and the parabola contains .

The parabola is opens down.

Standard form of the vertical parabola is .

Where vertex : , focus : , axis of symmetry: and directrix: .

Focus of the vertical parabola: .

and .

.

Vertex of the vertical parabola : .

Substitute and in standard form.

and

and .

As the parabola opens down, .

Therefore, .

Vertex of parabola : .

Axis of symmetry : .

Directrix : .

Standard form of the vertical parabola is .

Substitute the values of , and in standard form.

.

Therefore, the standard form of the equation is .

Graph :

Plot the vertex, focus.

Graph the parabola , axis of symmetry and directrix .

.

The standard form of the equation is .

Graph of the is

.