A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

NEED HELP!!! Derive the equation of the parabola with a focus at (−5, 5) and a directrix of y = -1.

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @jagr2713

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @iambatman

  3. LynFran
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1435020052864:dw|

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I don't get it

  5. LynFran
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok since we have focus (-5,5) and directrix at y=-1 note that the directrix and the focus is the same distance away from the vertex so the vertex must have cordinates x=-5 & y=2

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ok

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Here is the answer choices f(x) = −one fourth x2 f(x) = one fourth x2 f(x) = −4x2 f(x) = 4x2

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @LynFran I Still Need Help I Don't Get It

  9. LynFran
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i would like to think its \[f(x)= -\frac{ x ^{2} }{ 4 }\]

  10. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.