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anonymous
 one year ago
@freckles
anonymous
 one year ago
@freckles

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Using a directrix of y = 2 and a focus of (1, 6), what quadratic function is created? f(x) = 1/8(x  1)2  2 f(x) = 1/8(x + 1)2  2 f(x) = 1/16(x + 1)2  2 f(x) = 1/16(x  1)2 + 2

freckles
 one year ago
Best ResponseYou've already chosen the best response.1first little drawing: dw:1433741364872:dw I'm going to put the vertex midway between that horizontal line (Called y=2) and the focus point (1,6) We will see if you are able to tell with the vertex point is...

freckles
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433741453855:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.1the point I labeled V is the vertex it is midway between the directrix (y=2 ) and the focus can you tell me the coordinates of the V point O have plotted for you

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0am i right or am i misunderstanding

freckles
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433741706545:dw \[4p(yk)=(xh)^2 \\ \text{ you said vertex was } (1,2)=(h,k) \\ 4p(y2)=(x1)^2 \] now we need to find p is the distance between the vertex and the focus or also the distance between the vertex and the directrix p can be negative or positive depending on which way it is opened ours is opened up so it will be positive

freckles
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433741880300:dw this distance is p

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so we do \[\frac{ y_2  y_1 }{ x_2  x_1 }\] ?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1it is a distance not a slope

freckles
 one year ago
Best ResponseYou've already chosen the best response.1\[4p(y2)=(x1)^2 \\ 4(4)(y2)=(x1)^2 \\ 16(y2)=(x1)^2 \\ \] divide both sides by 16 and then add 2 on both sides

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[y  2 = \frac{ (x  1)^2}{ 16 }\] \[y = \frac{ 2 + (x  1)^2 }{ 16 }\] like this?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh so the answer is D

freckles
 one year ago
Best ResponseYou've already chosen the best response.1why does 2 have 16 underneath it ?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1you add 2 on both sides after dividing 16 on both sides

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sorry that was a typo

freckles
 one year ago
Best ResponseYou've already chosen the best response.1\[y=2+\frac{(x1)^2}{16} \\ y=\frac{1}{16}(x1)^2+2\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks can you help with a couple more?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ill post them in a new thread so you can get more medals ?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1I actually have to leave here I'm sorry

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay np thnx for the help anyways

freckles
 one year ago
Best ResponseYou've already chosen the best response.1it's 1 am almost I have to wake up early

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no don't worry about it your good thanks
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