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Mathematics
Mathematics
Problem
Determine the equation of the parabola with focus
(
0
,
−
7
)
(0,-7)
(
0
,
−
7
)
and directrix
y
=
7
y=7
y
=
7
. a)
y
2
=
−
28
x
y^{2}=-28x
y
2
=
−
28
x
b)
x
2
=
28
y
x^{2}=28y
x
2
=
28
y
c)
x
2
=
−
28
y
x^{2}=-28y
x
2
=
−
28
y
d)
x
2
=
−
56
y
x^{2}=-56y
x
2
=
−
56
y
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