A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

The vertex of this parabola is at (-3, -1). When the y-value is 0, the x-value is 4. What is the coefficient of the squared term in the parabola's equation?

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

    help me please

  2. Zale101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Apparently, you have 2 given points the vertex and the x-intercept the vertex is (-3,-1) the x-intercept is (4,0) clear?

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

    no

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

    i dont understand any

  5. Zale101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what part of what i just said didn't make sense to you?

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

    well i dont understand how to get the answer

  7. Zale101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i know you dont understand on how to find the answer, but what about the description i made, did it make sense ?

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

    yes

  9. Zale101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The equation of a parabola in a vertex form \[y = a(x - h)^2 + k\] vertex (h,k)=(-3,-1) x intercept x,y=(4,0) tat means the only variable left is a, solve for it

  10. Zale101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Sorry about the confusion earlier, i should have used y=a(x-h)^2+k since you already mentioned it to me.

  11. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Here is a summary of the 3 main points

  12. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    So you are given 2 points, and one of them is the vertex, at the vertex f'(x) = 0 f ' (-3)=0 (1) f(-3) =1 (2) f(4)=0 (3) So you have these 3 pieces of information

  13. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    A parabola is a quadratic of the form y=ax^2+bx+c you have 3 unknowns and you can form 3 linearly independent equations y'(-3)=0 y(-3)=1 y(4)=0 solve for a,b,c

  14. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    that 1 should be -1, fix that and carry on

  15. 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.