The equation is .

Find axis of symmetry:

Formula for the equation of the axis of symmetry:  .

               (Substitute )

                      (Multiply: )

                         (Cancel common signs)

                              (Divide: )

The equation for the axis of symmetry is .

Find vertex:

Use the value you found for the axis of symmetry as the  x - coordinate of the vertex.

To find the y-coordinate, substitute that value for x in the original equation.

     (Substitute )

       (Evaluate powers: )

             (Multiply: )

                         (Add: )

                                 (Subtract: )

The vertex is at .

Find y-intercept:

The graph is observed that,

The y-intercept is the point where the graph intersects the y-axis. It is located at (0,13), so the y-intercept is 13.

The equation of the vertex is , the axis of symmetry is  and y-intercept is 13.