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Equation of Parabola

Videos and lessons to help High School students learn how to derive the equation of a parabola given a focus and directrix.

Parabola Focus and Directrix 1
Parabola as the locus of all points equidistant from a point and a line.

Focus and Directrix of a Parabola 2
Finding the focus and directrix of a parabola.

Using the focus and directrix to find the equation of a parabola.

Parabola: find equation of parabola with focus (4,0) and directrix x = 0
Find equation of parabola with focus (4,0) and directrix x = 0
Answer: y2 = 8x - 16

Find Equation of Parabola given Focus and Directrix
Focus at (2, 4). Directrix x = -4

Drag point A. How are AB and BC related?

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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