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tw101
 one year ago
Write the equation of the parabola with a focus (1,2) and directrix y = 1.
tw101
 one year ago
Write the equation of the parabola with a focus (1,2) and directrix y = 1.

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tw101
 one year ago
Best ResponseYou've already chosen the best response.0Im not sure how to start.

tw101
 one year ago
Best ResponseYou've already chosen the best response.0okay the formula you put up above?

tw101
 one year ago
Best ResponseYou've already chosen the best response.0oh okay, onne second and then ill tell you what I got:)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0one may note that 1,2 is the focus point, not the vertex point

tw101
 one year ago
Best ResponseYou've already chosen the best response.0oh wait what does that mean then?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0well... she maybe crazy, but still beautiful, so tis ok =)

tw101
 one year ago
Best ResponseYou've already chosen the best response.0im seriously confused though...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439942544203:dw

tw101
 one year ago
Best ResponseYou've already chosen the best response.0Im not sure... Im sorry, this is new to me.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0hmmm well.. have you covered parabolas yet?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0well.. it turns out that the focus point is "p" distance from the vertex and the directrix is "p" distance also from the vertex so.. the vertex is really halfway between both, since the focus and directrix are the same distance from the vertex keeping in mind that, the parabola opens up towards the focus point

tw101
 one year ago
Best ResponseYou've already chosen the best response.0Okay, well crazyandbeautiful helped me out and said that (1,3/2) was the vertex. haha.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0hmmm how did she get 1, 3/2 though?

tw101
 one year ago
Best ResponseYou've already chosen the best response.0haha no you dont need to its okay! @Crazyandbeautiful

tw101
 one year ago
Best ResponseYou've already chosen the best response.0okay so its always halfway between the focus point and directrix?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeap, they're always "p" distance from the vertex

tw101
 one year ago
Best ResponseYou've already chosen the best response.0Where do I go from there?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so... get the vertex, get "p" and plug and chug \(\large{ \begin{array}{llll} (y{\color{blue}{ k}})^2=4{\color{purple}{ p}}(x{\color{brown}{ h}}) \\ (x{\color{brown}{ h}})^2=4{\color{purple}{ p}}(y{\color{blue}{ k}})\\ \end{array} \qquad \begin{array}{llll} vertex\ ({\color{brown}{ h}},{\color{blue}{ k}})\\ {\color{purple}{ p}}=\textit{distance from vertex to }\\ \qquad \textit{ focus or directrix} \end{array}}\)
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