New to Sophia?
This lesson demonstrates how to find the focus and directrix of a parabola when given its equation in standard form, and how to find the equation when given the focus and directrix.
Sophia college courses cost up to 80% less than traditional courses*. Start a free trial now.
In this lesson, I'll show you how to take the equation of a parabola in standard form and figure out where its directrix and focus are, and vice versa!