Derive the equation of the parabola with a focus at (−7, 5) and a directrix of y = −11.
a) f(x) = −one eighth (x − 2)2 + 6
b)f(x) = one eighth (x − 2)2 + 6
c)f(x) = −one eighth (x + 2)2 + 8
d)f(x) = one eighth (x + 2)2 + 8

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please help

sec just making sure my numbers work

thank you ive narrowed it down to either a or c but i dont know what to do for there

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