Equation of Parabola Given Focus and Directrix

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Learn how to find the equation of a parabola given the focus and directrix in this free math video tutorial by Mario's Math Tutoring.

0:10 What is a Parabola
0:53 Formula for a Parabola
1:20 How to Know Which Direction the Parabola is Opening
1:42 Write the Equation of the Parabola with Directrix x=-1 and Focus (3,1)
3:12 How Wide is the Parabola. Finding 2 More Points on the Parabola

Related Videos:

How to Graph Parabolas and Write the Equation

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Mr. Mario can you please make a video on finding the equation of parabola when focus and vertex are given?

ambedkarclasses
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Mr.Mario, can you please make a video on finding the vertex, focus, and, directrix, etc. given a equation. Ex. x=3/8x^2 And then graphing it.

coolguys
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Really filled in some gaps that were left by my professor. thank you!

JACdUpProductions
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Thanks Mr.Mario, I really appreciate it

samirkurudi
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whta if you were given 2 directrixes and one focus?

yanniecharm
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I guess the final qs should be (y-1)*2=8(x-3)

Am i right sir?


Really appreciate your professional approach sir

halservices
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(y-k)^2=2p(x-h) vs (x - h)2 = 4p (y - k). Why some books uses the second and others the first. There is any difference?

Aceituna
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*the perpendicular is going to get longer*

codedummydev