Find the vertex, focus, and directrix of each parabola with the given equation.

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Qnja46550

Mathematics

Question Description

(y + 3)2 = 12(x + 1)

A. Vertex: (-1, -3); focus: (1, -3); directrix: x = -3

B. Vertex: (-1, -1); focus: (4, -3); directrix: x = -5

C. Vertex: (-2, -3); focus: (2, -4); directrix: x = -7

D. Vertex: (-1, -3); focus: (2, -3); directrix: x = -4

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Explanation & Answer

Thank you for the opportunity to help you with your question!

the answer is D, you can plug in the numbers to check. Best me thanks

graph is here: Screen Shot 2015-06-03 at 6.44.55 PM.png

the straight line is directrix x=-4

Please let me know if you need any clarification. I'm always happy to answer your questions.

Sngva Zraunm (1755)
Carnegie Mellon University

Anonymous
Really great stuff, couldn't ask for more.

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