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Mathematics
Problem
The focus of a parabola is
(
−
5
,
0
)
(-5,0)
(
−
5
,
0
)
and its directrix is the line
x
=
5
x=5
x
=
5
. What is the equation of the parabola? a)
y
2
=
20
x
y^{2}=20x
y
2
=
20
x
b)
y
2
=
−
20
x
y^{2}=-20x
y
2
=
−
20
x
c)
y
2
=
−
40
x
y^{2}=-40x
y
2
=
−
40
x
d)
x
2
=
−
20
y
x^{2}=-20y
x
2
=
−
20
y
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