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focal length (c’)
1/(4|a|)
focal point
( x-int, y-int + 1/(4a) )
(h, k + p)
directrix
y = y-int + 1/(4a)
y = k-p
p
1/(4a)
k
y intercept
a
coefficient in vertex form
y = a(x-h) + k
h
x intercept