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Write an equation of a parabola with a vertex at the origin and a directrix at y = 5. (1 point)
 one year ago
 one year ago
Write an equation of a parabola with a vertex at the origin and a directrix at y = 5. (1 point)
 one year ago
 one year ago

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amistre64Best ResponseYou've already chosen the best response.1
dw:1361820796488:dw
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
we can use this to refine our parabola
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
since the vertex is at (0,0) and the directrix is: 5 units from it, a = 5 lets start with: y = kx^2 and define k when x = 2a, y = a 10 5 5 = k(10)^2 5/100 = k = 1/20 maybe
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
dw:1361821070744:dw
 one year ago
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