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Domain and Range With Ovals

  1. Aug 26, 2014 #1

    dakiller

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    1. The problem statement, all variables and given/known data

    There are two vertical ovals, one containing the x-coordinate values and one containing the y-coordinate values. The x-axis values: -1, 8, 0 and the y-axis values: -4, 0, -1

    (-1,-4) (8,0) and (0,-1) are the three points.

    2. Relevant equations

    I'm not sure this is an equation nor did I see any of these in Algebra II

    3. The attempt at a solution

    So in my mind I can't decide would I list this like an inequality with:

    Domain- -1≤x≤8
    Range -1≤y≤8

    or would I make it like it is just three points so that?

    Domain= {-1,0,8}
    Range= {-4,-1,0}

    Thank you so much for any assistance in advance!
     
    Last edited: Aug 26, 2014
  2. jcsd
  3. Aug 26, 2014 #2
    Can you take a picture and post it?

    Based on your description, I think the set notation is better.

    Also, are there arrows showing a mapping of X to the values Y? Usually when I say range, I mean the image of the function.
     
  4. Aug 26, 2014 #3

    LCKurtz

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    That is an incomprehensible statement of the problem. Please give the exact wording from your text.
     
  5. Aug 26, 2014 #4

    dakiller

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    attachment.php?attachmentid=15990&d=1224562371.jpg

    Its like this except with the values I gave.
     
  6. Aug 26, 2014 #5

    LCKurtz

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    Your domain that I copied above is correct. I don't see what this has to do with ovals though.
     
  7. Aug 26, 2014 #6

    HallsofIvy

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    In that case your answers, Domain -1≤x≤8 and Range -1≤y≤8, are wrong because they imply that x could be a real number between -1 and 8, for example x= 1.25. The domain is simply the set {-1, 0, 8} and the range is the set {-4, -1, 0}. Yes, it really is that easy!
     
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