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Finger [1]
3 years ago
11

What is the equation of the quadratic graph with a focus of (8, −8) and a directrix of y = −6?

Mathematics
1 answer:
yarga [219]3 years ago
4 0
The vertex is exactly half way between directrix and focus. In this case the vertex is (8,-7)
               (h,k)

P is the distance between the vertex and either the directrix or focus,  in this case p = 1. 

a = 1/(4p)  or 1/(4*1) or 1/4

write the equation in vertex form

y = a(x-h)^2 + k

y = 1/4(x-8)^2 -7
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