A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Identify the domain and range and sketch the graph of the function y=-sqrt-x

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

    \[y=\sqrt{-x}\]

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

    \[y=-\sqrt{-x}\]

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

    you can't take the square root of a negative number , solve \[-x\geq 0\] in one step to get the domain

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

    same domainfor \(y=-\sqrt{-x}\)makes no difference

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

    as for the range, the square root is greater than or equal to zero, so minus the square root will be less than or equal to zero

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

    Ok so the domian would be (-infinity, infinity)?

  7. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    HI!!

  8. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    and no

  9. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    do you know how to solve \[-x\geq 0\] for \(x\)?

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

    No

  11. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    if not, that is fine, i will show you

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

    Ok thanks

  13. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok change the sign, and flip the inequality

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

    Ok

  15. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    the math teachers call it "multiply by \(-1\)" or sommat, but you just make it positive and change greater than or equal to to less that or equal to

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

    what @misty1212 said

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

    don't you divide by -1 and flip the sign?

  18. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    lol multiply by -1, divide by -1, potato potahto

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

    ok so would the domain be -1?

  20. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ooooh kay lets go slow

  21. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    the domain is an interval right? not a number

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

    Yes

  23. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    the question is, what interval is it now we know that you cannot take the square root of a negative number, so the input has to be positive right?

  24. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    the input in this case is \(-x\) in english we would say that \(-x\) must be greater than or equal to zero in math write \[-x\geq 0\]

  25. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    to solve that for \(x\) change the sign so that it is \(x\) instead of \(-x\) and change the inequality as well

  26. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    i.e \[-x\geq 0\iff x\leq 0\] and that is your domain

  27. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    if you want to write it as an interval that works too, call it \[\huge (-\infty, 0]\]

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

    Ok so what would the range be?

  29. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok again we go slow the range is all possible outputs the square root is always greater than or equal to zero you have a minus sign in front, so that means the range will be all numbers less than or equal to zero

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

    Ok so how would I graph it?

  31. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    if you want to write it as an interval, write it the same as the domain in this case they are the same

  32. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    how to you graph \(y=-\sqrt{-x}\)?

  33. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    is that the question?

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

    Well I have to sketch the graph of the function

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

    do you know what \(y=\sqrt{x}\) looks like?

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

    No

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

    hmm then you can't really do it maybe look it up

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

    ok

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

    http://www.wolframalpha.com/input/?i=plot+y%3D%E2%88%92%E2%88%9A-x%3F

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

    ok be very careful here

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

    wolfram has given you too much information

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

    where it says "complex valued plot" change it to "real valued plot"

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

    Oh ok thanks

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

    |dw:1440985596594:dw|you should see something like that

  45. 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.