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Finding equation

  1. May 8, 2007 #1
    Dear all,
    I want to find functional relationship between two datas set.How to find,it relation is linear,exponential,logarthemics,polynomial functions in terms of equation format.(any ref.material regarding this would be useful)

    Dataset
    0.5° 121.20
    5° 123.02
    10° 125.04
    15° 127.06
    20° 129.07

    Thanks in advance
    Prakash
     
  2. jcsd
  3. May 8, 2007 #2

    Office_Shredder

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    Eyeballing it, it looks exceedinly linear
     
  4. May 8, 2007 #3
    I agree, but the first and last data points are off.
     
  5. May 9, 2007 #4
    Do you have any other values? That would be helpful.
     
  6. May 9, 2007 #5

    Office_Shredder

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    Honestly, the first data point is off by something like .01 per five degrees.....

    the second data point isn't even off considering the significant digits involved (2.02/5 degrees = .202/.5 degrees, so the first one should be 121.202, but it's rounded)
     
  7. May 9, 2007 #6
    Yeah, you're right. I graphed it as basically linear, besides those points. So the equation is n=121+2.02d if d is equal to the degrees at fives.
     
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