A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

donnie1999

  • one year ago

Determine in which direction the parabola below opens. y = -2x^2 + 5x - 2

  • This Question is Closed
  1. donnie1999
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @SoulEater142

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

    Ok, here: ~ b and c can be any negative or positive real numbers (or can be zero). ~ a is a positive number that can't be equal to zero (and thus -a is a negative number) `----------------------------` `UP/DOWN opening parabolas.` If you have \(\large\color{black}{ \displaystyle y=ax^2+bx+c }\) then, this parabola opens UP If you have \(\large\color{black}{ \displaystyle y=-ax^2+bx+c }\) then, this parabola opens DOWN `LEFT/RIGHT opening parabolas.` If you have \(\large\color{black}{ \displaystyle x=-ay^2+by+c }\) then, this parabola opens to the LEFT If you have \(\large\color{black}{ \displaystyle x=ay^2+by+c }\) then, this parabola opens to the RIGHT

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

    do you want some real (not abstract) examples?

  4. donnie1999
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Im confused so the answer is right???

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

    here is some help

    1 Attachment
  6. some.random.cool.kid
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah don those were what I meant his examples is a negative the other one was positive.

  7. donnie1999
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ohh so am i correct in saying that the answer is UP?

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

    yes

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

    I will give you some examples. OPENS UP (examples) \(\large\color{black}{ \displaystyle y=x^2-4x+2 }\) \(\large\color{black}{ \displaystyle y=0.2x^2-18 }\) \(\large\color{black}{ \displaystyle y=19x^2+6x }\) \(\large\color{black}{ \displaystyle y=3x^2+3x+3 }\) (as long as that number in front of x² is positive) OPENS DOWN (examples) \(\large\color{black}{ \displaystyle y=-x^2 }\) \(\large\color{black}{ \displaystyle y=-0.01x^2+200 }\) \(\large\color{black}{ \displaystyle y=-9x^2-17x }\) \(\large\color{black}{ \displaystyle y=-5x^2+3x-7 }\) (as long as that number in front of x² is negative)

  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.