Not sure how the answers were achieved in this graph

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The discussion revolves around understanding how to derive function values from a given graph. The user initially struggles with determining the domain and range for specific functions labeled a-d, which appear as straight lines. Clarification is provided that the task is to read the function values at specified x-values directly from the graph. The user acknowledges this misunderstanding and expresses gratitude for the assistance. The conversation highlights the importance of correctly interpreting graph data in mathematical problems.
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Homework Statement


http://i.imgur.com/vqyXW.png




Homework Equations





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.
 
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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 .
 
Ah, I see. THank you very much.
 

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