optimisiticlana optimisiticlana

11-07-2020
Mathematics

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given the vertex (2,9) and the foci (5,9), what is the equation of the directrix

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PollyP52 PollyP52

11-07-2020

Answer:

x = -1

Step-by-step explanation:

The vertex is halfway between the focus and the directrix.

So here the directrix is a vertical line to the left of the vertex and passing through the point (2-3, 9) = (-1, 9)

It is x = -1.

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