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Mathematics 19 Online
OpenStudy (anonymous):

What is the focus of the parabola given by the equation y =-1/28x^2?

OpenStudy (anonymous):

(-1/112,0) I think so...

OpenStudy (anonymous):

No, it is either (-7,0), (0,7), (0,-7), (7,0)

OpenStudy (zehanz):

General formula: x²=4py, then focus is (0,p). So do a little reworking of the formula to get your focus!

OpenStudy (zehanz):

So... \( x^2=-28y=4 \cdot -7y\). Methinks focus is (-7,0).

OpenStudy (anonymous):

Thank you

OpenStudy (zehanz):

YW!

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