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A question on plotting functions on a graph

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  1. Dec 30, 2015 #1
    when i was reading a supplementary notes doc from open course ware fro MIT on single variable calculus there was a description about a graphical representation of a single valued function as
    " if each line parallel to the y- axis and which passes through a point in the domain intersects the graph at only one point then our function is single valued " my point is since it is a line drawn parallel to the y- axis for each input there will be several outputs ,therefore how come it is a function at all?
     
  2. jcsd
  3. Dec 30, 2015 #2

    BvU

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    Make a drawing and indicate what you read from this sentence. It seems to me you misunderstand the statement....
     
  4. Dec 30, 2015 #3
    thanks got it
     
  5. Dec 30, 2015 #4

    BvU

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    You're welcome.
     
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