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Mathematics 17 Online
OpenStudy (kamibug):

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OpenStudy (anonymous):

do you know what a focus and directrix are for a quadratic?

OpenStudy (imstuck):

oh these are fun!!!!!!!!!

OpenStudy (anonymous):

if you know how a quadratic is defined in terms of it's focus and directrix, you'd know that the vertex is midway between the two

OpenStudy (anonymous):

your points are wrong

OpenStudy (anonymous):

your directrix is what?

OpenStudy (anonymous):

and what is that?

OpenStudy (anonymous):

sure, but that's not the point you want...|dw:1411404604882:dw|where is the focus?

OpenStudy (anonymous):

so plot the point (the focus) and draw where the parabola goes

OpenStudy (anonymous):

just roughly, no need to be exact... yet

OpenStudy (anonymous):

nope

OpenStudy (anonymous):

|dw:1411404962400:dw|

OpenStudy (anonymous):

you don't understand what a focus or directrix is, nor how they relate to the parabola.

OpenStudy (anonymous):

if you did, you wouldn't have any issues drawing the tthing or finding it's vertex. where is the vertex?

OpenStudy (anonymous):

i'm not rying to be mean but you need to understand the definition of the terms and how they relate to the object in question. drawing things out is a great way to visualize what's going on and see how things are related

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