Equation:
The vertex is given by the following formula:
where the vertex is (h, k). Thus, in our equation k = -1 and h = 5, and the vertex
is (5, -1).
Additionally, the focus is given by (h+p, k). In our case:
Then, the focus is:
Simplifying:
The directrix is x = h - p:
Finally, the axis of symmetry is y = -1.