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itsmichelle29
 one year ago
I give medals to helpers thanks
Regan is trying to find the equation of a quadratic that has a focus of (−2, 5) and a directrix of y = 13. Describe to Regan your preferred method for deriving the equation. Make sure you use Regan's situation as a model to help her understand.
itsmichelle29
 one year ago
I give medals to helpers thanks Regan is trying to find the equation of a quadratic that has a focus of (−2, 5) and a directrix of y = 13. Describe to Regan your preferred method for deriving the equation. Make sure you use Regan's situation as a model to help her understand.

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itsmichelle29
 one year ago
Best ResponseYou've already chosen the best response.0can you guys help me plz

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0y = 1/16(x  (2))^2 +9.

itsmichelle29
 one year ago
Best ResponseYou've already chosen the best response.0I dont understand

itsmichelle29
 one year ago
Best ResponseYou've already chosen the best response.0Describe to Regan your preferred method for deriving the equation. Make sure you use Regan's situation as a model to help her understand. Can you give me this answer

itsmichelle29
 one year ago
Best ResponseYou've already chosen the best response.0hi omg can you please help me

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1no one likes these conic section questions, but they are not that hard really

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1first off, do you know what the parabola would look like (open right, left, up or down?)

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1hmm that is a problem lets plot the focus and graph the directrix

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1dw:1434503255264:dw

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1you can see that the focus \((2,5)\) is BELOW the directrix, which is a horizontal line that means the parabola will open DOWN

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1the next thing we need to do is find the vertex do you know how to find it ?

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1it is the point half way between \((2,5)\) and \(y=13\) what is half way between \(5\) and \(13\)?

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1right (got logged out somehow)

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1that means the vertex is \((2,9)\)

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1now we are almost done

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1since the vertex is \((2,5)\) and it opens down, it will look like \[4p(y9)=(x+2)^2\] all we need is \(p\) and to note that \(4p\) will be negative since it opens down

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1oops i meant "since the vertex is \((2,9)\) my mistake

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1to find \(p\) is also easy it is the distance between the focus \((2,5)\) and the vertex \((2,9)\)

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1how far from \(5\) to \(9\)?
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