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Identity the vertex, focus, and directrix
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Identity the vertex, focus, and directrix

Identity the vertex, focus, and directrix-example-1
User Vyctorya
by
3.3k points

1 Answer

5 votes

Answer:

vertex: (0, 0)

focus: (-7, 0)

directrix: x=7

Explanation:

  1. divide both sides by (-1/28) and you will get y^2=-28x
  2. -28=-4p ----> p=7
  3. focus=(-p, 0) ------> (-7, 0)
  4. directrix=x=p ---------> x=7
User Brutus
by
3.3k points
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