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The parabola has a focus at (−3, 0) and directrix y = 3. What is the correct equation for the parabola? x2 = −12y x2 = 3y y2 = 3x y2 = −12x

User Ray Womack
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2 Answers

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Final answer:

The correct equation for the parabola with a focus at (-3, 0) and directrix y = 3 is (x + 3)^2 = 12y.

Step-by-step explanation:

The equation of a parabola with a focus at (h, k) and a directrix with the equation y = p is given by the equation

(x - h)^2 = 4p(y - k)

In this case, the focus is at (-3, 0) and the directrix is y = 3. Therefore, we can substitute the values into the equation:

(x - (-3))^2 = 4(3)(y - 0)

Simplifying further will give us the equation of the parabola:

(x + 3)^2 = 12(y - 0)

Therefore, the correct equation for the given parabola is (x + 3)^2 = 12y.

User Ben Paton
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4 votes

Answer:

D) y^2=-12x

Step-by-step explanation:

User Inliner
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