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Logarithm graph

  1. Jan 25, 2012 #1
    1. The problem statement, all variables and given/known data

    The table gives a firm’s monthly profits for their first few months of business. The numbers are rounded to the nearest £100.


    Number of months after start up (x) 1 2 3 4 5 6
    Profit for this month (£y) 500 800 1200 1900 3000 4800


    The firm’s profits, £y, for the xth month after start up are modelled by

    y = k x 10ax

    where a and k are constants.

    Plot this data on semi log paper to verify if this relationship is true.





    2. Relevant equations

    N/A

    3. The attempt at a solution

    That's why am asking for help. I do not know what to do.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jan 25, 2012 #2

    vela

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    It's not clear what you mean here. Did you mean ##y=10akx^2## or ##y=k 10^{ax}## or ##y=k x 10^{ax}## or something else altogether?

    This is a good place to start.
     
  4. Jan 25, 2012 #3


    Sorry, I meant y=k x 10^{ax} and how should I start on drawing semi-log pap
     
  5. Jan 25, 2012 #4

    vela

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    Is that x supposed to be the variable x or a multiplication sign?
     
  6. Jan 25, 2012 #5
    multiplication
     
  7. Jan 25, 2012 #6

    vela

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    Check this out:

    http://www.math.neu.edu/fries/semilog-ex-hwk.pdf [Broken]
     
    Last edited by a moderator: May 5, 2017
  8. Jan 25, 2012 #7
    Thanks very much.


    I have one more questions to ask that I'm stuck with. I'll post it later
     
    Last edited by a moderator: May 5, 2017
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