A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

graph y=IxI-4....

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

    Refer to the attachment

    1 Attachment
  2. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    as evidenced by the co-ordinates of (-4,0) (0,-4) (4,0)? how to get those points mathematically? y=x-4, y=x+4? Or - what did you apply to get those co-ordinates?

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

    Mathematica generated the plot with the following Plot function call: Plot[Abs[x] - 4, {x, -5, 5}, AspectRatio -> Automatic] The absolute value of a signed number is the number with the sign of it stripped off. For positive numbers there is no change. The absolute value of -4 is 4. |-4| - 4 is 4 - 4 = 0. This is the point on the negative x axis. Remember that there is a formula to calculate y given a value of |x|. That is, y = |x|-4. At x = -4 the line crosses the negative x axis because the associated y value is |-4| -4 = 4 -4 which is 0.. When x is 0 the (|0| - 4) = -4. Both lines meet at the point (0,-4) If you did not have to contend with the absolute operator, then the line would be straight and would not change direction at (0,-4).

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

    One thing I forget to stress is that in evaluating a math expression with absolute values it is probably a good idea to evaluate the absolute values first changing any negative signs inside the two vertical bars to plus, at least in your mind.

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

    Brilliant! This explains it better, I appreciate your thorough response

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

    Thank you and sorry for the delay. I am 76 years old and I am not able to knock out the narrative as fast as a much younger person. Have a good day.

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

    : ) You did great! It's 3:20am here, so I'm reading slow anyway ; )

  8. 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.