Find the equation of a parabola with its vertex at the origin and a focus of (-8,0)

the equation of a parabola with its vertex at the origin and a focus of (-8,0)

vertex is (0,0), h=0  and k=0

Focus is (-8,0)

Focus is (h+p, k)

We know h=0  and k=0

(0+p, 0) is (-8,0)

p = -8

General form of equation is

h=0, k=0 and p =-8

Answer : option A

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