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Not sure how the answers were achieved in this graph

  1. Aug 18, 2011 #1
    1. The problem statement, all variables and given/known data
    http://i.imgur.com/vqyXW.png




    2. Relevant equations



    3. The attempt at a solution

    I got the DOmain and Range of the graph, but then it says to do the same for the functions a-d. If you graph them then they are all straight lines so there's really only a domain.

    But when I checked at the back of the book, the answers came to be

    A)0
    B)-1
    C)0
    D)-2

    I'm sure I'm missing something. Any help is appreciated. Thank you.
     
  2. jcsd
  3. Aug 18, 2011 #2

    dynamicsolo

    User Avatar
    Homework Helper

    You are misunderstanding that part of the problem. They are just asking you to use the graph to read off the values of the function f(x) at each of the indicated values of x .
     
  4. Aug 18, 2011 #3
    Ah, I see. THank you very much.
     
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