A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Which inequality matches the graph?

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

    −2x + 3y > 7 2x − 3y < 7 −3x + 2y > 7 3x − 2y < 7

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

    Get y alone by solving, then compare the slopes y > or < mx+b (m is slope) and the y intercept.

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

    so, whats next?

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

    Then you have to see which way it is being shaded in and compare it to the sign of the matching inequality.

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

    i dont know how?

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

    Did you find the slop and y intercept? It will help narrw it down

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

    no, but i think the answer its B? ITS RIGHT?

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

    @Jackellyn

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

    The answer is B, but why? I'll give you a shortcut method that might help you. 1. First, pick any point that the inequality would work for; so any point in the region. The easiest is (0,0). If you substitute in (0,0) into all the equations, only B and D work, right? 2. So we've narrowed it down to being either B or D. If you rearrange the equations (only B or D, because we know it's one of those) we're looking for a line that has a positive slope, because the slope of the line in the picture is positive, right? So, we can rearrange the equations, as @jackellyn said, in the form y < mx + b. If m is a negative number, it means the slope is negative. If m is a positive number, the slope is positive. We want a positive slope, so we want a positive m value.

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

    D) 3X - 2y <7 ?

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

    ??/

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

    Oops my bad, I forgot to mention one last thing. If we get positive slopes for both B and D (which we did) then we need to consider the y intercepts too. In fact the answer is D (not B, sorry). It's because, in the picture it shows us that the y-intercept is between -3 and -4. The y intercept for B is -7/3, which is about -2.3. The y intercept for D is -7/2, which is about -3.5.

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

    yea its D! THANK YOU SO MUCH!

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

    No problem, sorry for the confusion.

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

    CAN YOU HELP ME WITH ONE MORE?

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

    Ok, but create a new question for it.

  17. 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.