Derive the equation of the parabola with a focus at (2, 4) and a directrix of y = 8.

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1

Derive the equation of the parabola with a focus at (2, 4) and a directrix of y = 8.

a. f(x) = -1/8 (x - 2)2 + 6
b. f(x) = 1/8 (x - 2)2 + 6
c. f(x) = -1/8 (x + 2)2 + 8
d. f(x) = 1/8 (x + 2)2 + 8