Given the parabola whose equation is , find the focus and determine if the parabola opens up or down.

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asked Nov 12, 2019 102k views

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Captain Monk · Answer 1 · 2019-11-19T07:38:08+0000

The equation of a parabola is:

$y = ax {}^(2) + bx + c$
If a>0, then the parabola opens up;
If a<0, then the parabola opens down.
The coordinates of focus are:

$( - (b)/(2a) \: \: \frac{1 - b {}^(2) + 4ac}{4a} )$

Given the parabola whose equation is , find the focus and determine if the parabola opens up or down.

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