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Linearization of Inverse Proportionality

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

    Dear All,

    I currently have a set of data which, when plotted on a scatter diagram, proves an inverse proportionality between two sets of data. (Please see attachment.)

    I now need to linearize the graph as to estimate the half-life of the foam.


    2. Relevant equations


    -
    3. The attempt at a solution

    I tried to transform all y-values (y) into their corresponding 1/y values, thinking that inverting an inverse proportionality should have yielded a linear one, but it didn't help... Suggestions?
     

    Attached Files:

  2. jcsd
  3. Mar 25, 2012 #2
    Have you tried the log of the function yet?
     
  4. Mar 25, 2012 #3
    I get this..
     

    Attached Files:

  5. Mar 25, 2012 #4
    Hmm... May I see the data sets?
     
  6. Mar 25, 2012 #5
    It is only the last few points, beyond 20s, that deviate from a fairly good straight line and these points are probably the ones with greatest uncertainty....when the height of the foam is less than 0.5cm (5mm)....could you actually make these measurements to better than 1mm?
     
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