How to graph a parabola with a horizontal axis of symmetry

The video tutorial explains how to graph a parabola using its definition. It covers identifying the axis of symmetry, vertex, focus, and directrix. The tutorial demonstrates how to determine if the parabola opens to the right or left by calculating the value of P and locating the focus. The directrix is found by creating a perpendicular line at an equal distance from the vertex as the focus.

Explain how to find the vertex of a parabola from its equation.

What is the relationship between the vertex, focus, and directrix of a parabola?