In Exercises 5–-16, determine the coordinates of the focus and the equation of the directrir of the given parabolas, Sketch each curve.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section11.4: Plane Curves And Parametric Equations
Problem 55E
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In Exercises 5–16, determine the coordinates of the focus and the
equation of the directrix of the given parabolas. Sketch each curve.
Transcribed Image Text:In Exercises 5–16, determine the coordinates of the focus and the equation of the directrix of the given parabolas. Sketch each curve.
9. x² = 72y
Transcribed Image Text:9. x² = 72y
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