A parabola is the set of all points equidistant from a point (called the focus) and a line (called the directrix). In this tutorial you will learn about the focus and the directrix, and how to find the equation of a parabola given its focus and directrix.
4812_Focus_directrix_of_a_parabola_from_equation_.html
All video content by Khan Academy is under their license: CC by NC SA
Website created using Khan Academy Static Downloader