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OpenStudy (sainath):
find an equation of a parabola with a vertex at the origin and directrix y=-2.5
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OpenStudy (sainath):
OpenStudy (sainath):
@zepdrix
OpenStudy (sainath):
@phi
OpenStudy (studyloverhojea):
Switch in the y as -2.5 and if it makes sense, then that's the answer.
OpenStudy (sainath):
y=-{1}/{10}x^2
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OpenStudy (phi):
I think it's y = (1/10) x^2
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