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write an equation of a parabola with a vertex at the origin and a directrix at y=5

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vertex

asked May 16, 2016 in ALGEBRA 1 by anonymous
reshown May 16, 2016 by goushi

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1 Answer

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The directrix equation is and vertex .

Standard equation parabola is ,

where is vertex and directed distance from vertex to focus.

Directrix equation is .

Substitute the and values.

Substitute and values in .

Parabola equation is .

answered May 16, 2016 by Anney Mentor

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