A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

The graph below represents which system of inequalities? y less than or greater to -2x + 3 y less than or greater to x + 3 y greater than or equal to -2x + 3 y greater than or equal to x + 3 y less than or greater to -3x + 2 y less than or greater to -x + 2 y > -2x + 3 y > x + 3

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

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

    hint: ignore the green and yellow for now, just focus on the two black lines write the equations for the lines in point intercept form

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

    y=1/ 1/2+3

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

    ?

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

    uh... not quite

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

    |dw:1443914795869:dw| lets focus on one line at a time. what is the equation of this line?

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

    ok

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

    |dw:1443914881362:dw| write the equation for this line please

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

    y=3x-3 ? @Vocaloid

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

    nope first find the slope of the graph

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

    (x1,y1) = (-3,0) (x2,y2) = (0,3) slope = m = (y2-y1)/(x2-x1) = ?

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

    (0-3) and -3-0 @Vocaloid

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

    keep going (0-3)/(-3-0) = ?

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

    -3 and -3

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

    keep going

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

    / means divide...

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

    -3/-3 = ?

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

    1

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

    @Vocaloid

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

    good, so our slope is 1 now find the y-intercept

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

    3 @Vocaloid

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

    good, so our equation is y = x + 3 now write an equation for the other line

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

    0,3 and -1, 2?

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

    @Vocaloid

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

    uh not quite

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

    look at the graph and pick two points on the line on the right

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

    |dw:1443916158259:dw|

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

    ill i can see is 3/ 1.5

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

    @Vocaloid

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

    not quite...

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

    two points are (0,3) and (2,-1) now calculate the slope between them

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

    -1

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

    @Vocaloid

  34. texaschic101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    slope = (y2 - y1) / (x2 - x1) (0,3)....x1 = 0 and y1 = 3 (2,-1)....x2 = 2 and y2 = -1 now we sub slope(m) = (-1 - 3) / (2 - 0) slope(m) = -4/2 slope(m) = -2 now we use y = mx + b slope(m) = -2 use either of your sets of points....(0,3)...x = 0 and y = 3 now we sub into the formula to solve for b, the y intercept 3 = -2(0) + b 3 = b so the equation for that line is : y = -2x + 3

  35. texaschic101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now take your 2 lines... y = x + 3 and y = -2x + 3 notice that both lines are solid...this means they both contain equal signs. notice that both lines are shaded below the line....this means that both lines are less then <. so the inequalities that match the graph are : y <= x + 3 and y <= 2x + 3

  36. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    This is how you solve this quickly since we are given choices. 1. Both lines are solid; that means either >= or <=, but not > or <. 2. Both lines have the shaded area under the solid line. That means y <= ax + b. 3. Both lines have y-intercepts of 3. That means both inequalities are of the form y <= ax + 3 The only set of inequalities that satisfies all conditions above is choice A. Of course, this is assuming that where you wrote "less than or greater to" you really meant "less than or equal to."

  37. 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.