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Mathematics 21 Online
OpenStudy (anonymous):

Find the focus, directix, and focal diameter of the parabola, and sketch its graph.

OpenStudy (anonymous):

What is the function?

OpenStudy (anonymous):

x^2 =9y

OpenStudy (anonymous):

parabola focus | (0, 9/4) vertex | (0, 0) semi-axis length | 9/4~~2.25 focal parameter | 9/2~~4.5 eccentricity | 1 directrix | y = -9/4

OpenStudy (anonymous):

how did you figure all of that out

OpenStudy (anonymous):

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