The function is .

Write the function in vertex form.

                      (Original function)

                      (Take out common factor)

                (Rewrite the function)

                        (Write as a perfect square form)

Find the vertex, axis symmetry and direction of opening.

The vertex form of a parabola is  .

Where is the vertex, is the axis of symmetry and determines the shape of the parabola and the direction in which it opens.

So, the vertex is .

The equation of axis of symmetry is .

The value of is positive, so the parabola opens up.

Graph:

Graph the function .

Axis of symmetry is , the parabola opens up.

Graph the function .