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anonymous
 one year ago
Derive the equation of the parabola with a focus at (0, −4) and a directrix of y = 4.
A.f(x) = −16x2
B.f(x) = 16x2
C.f(x) = −one sixteenth x2
D.f(x) = one sixteenthx2
anonymous
 one year ago
Derive the equation of the parabola with a focus at (0, −4) and a directrix of y = 4. A.f(x) = −16x2 B.f(x) = 16x2 C.f(x) = −one sixteenth x2 D.f(x) = one sixteenthx2

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@random231 @aaronq @sourwing @princeharryyy @satellite73 @DarkMoonZ @Baby_Bear69

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0the general form is x^2 = 4ay where a = the y coordinate of the focus can you work it out ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what do i work out sorry i have no idea what to do with these types of questions

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0the focus is at (0,4)  that is the y coordinate is  4

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0this type of parabola as the origin at (0,0) because x = 0 when y = 0 and as the focus is negative 4 opens downwards

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439568914238:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0no x^2 = 16y divide both sides by 16 f(x) = y =  1 x^2  16

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0C is the correct choice

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0A is sixteen C is negative sixteenth

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so what would be the equation to solve it ?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0the equation of the curve is f(x) =  one sixteenth x^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yea but to solve Derive the equation of the parabola with a focus at (−5, −5) and a directrix of y = 7.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439569218616:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0oh thats a new question
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