Register
Identity the vertex, focus, and directrix
63.6k views
20 votes
Identity the vertex, focus, and directrix

Identity the vertex, focus, and directrix-example-1
User Vyctorya
by
7.7k 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
7.2k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

8.8m questions

11.4m answers

Other Questions

What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
Write words to match the expression. 24- ( 6+3)
A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
Link Copied!