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Math Help - Formula for number series

  1. #1
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    Formula for number series

    Apologies if this is the wrong forum, maybe someone could help with the correct forum if its not ?

    I have the following sets of numbers (3 lines):

    1.8, 1.82, 1.85, 1.88, 1.92, 1.96, 2.01, 2.07, 2.14, 2.24, 2.34, 2.48, 2.66, 2.91, 3.29, 3.89, 5.01, 7.75

    2.25, 2.28, 2.31, 2.34, 2.38, 2.43, 2.48, 2.55, 2.62, 2.74, 2.85, 3, 3.21, 3.5, 3.94, 4.64, 5.94, 9.13

    2.79, 2.82, 2.85, 2.88, 2.92, 2.97, 3.03, 3.09, 3.17, 3.3, 3.42, 3.59, 3.82, 4.15, 4.64, 5.43, 6.92, 10.58

    They all increase in value, I am sure there must be some equation to work out further numbers on each line or maybe put 2.5 in as a starting number and it will find out the next set of numbers ? Hope someone understand what i mean...?!
    I tried putting them into Excel and graphing them and producing an equation but couldn't get a reliable fit.

    Thanks
    Jon
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by JonKidd View Post
    Apologies if this is the wrong forum, maybe someone could help with the correct forum if its not ?

    I have the following sets of numbers (3 lines):

    1.8, 1.82, 1.85, 1.88, 1.92, 1.96, 2.01, 2.07, 2.14, 2.24, 2.34, 2.48, 2.66, 2.91, 3.29, 3.89, 5.01, 7.75

    2.25, 2.28, 2.31, 2.34, 2.38, 2.43, 2.48, 2.55, 2.62, 2.74, 2.85, 3, 3.21, 3.5, 3.94, 4.64, 5.94, 9.13

    2.79, 2.82, 2.85, 2.88, 2.92, 2.97, 3.03, 3.09, 3.17, 3.3, 3.42, 3.59, 3.82, 4.15, 4.64, 5.43, 6.92, 10.58

    They all increase in value, I am sure there must be some equation to work out further numbers on each line or maybe put 2.5 in as a starting number and it will find out the next set of numbers ? Hope someone understand what i mean...?!
    I tried putting them into Excel and graphing them and producing an equation but couldn't get a reliable fit.

    Thanks
    Jon
    What is the origin of these sets of numbers, are they exact or the results of something like an experiment or simulation?

    (That is, is an exact fit required or an approximate fit needed)

    Also, why have you posted this in Advanced Geometry?

    RonL
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  3. #3
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    Hi Cap'n
    Thanks for the reply, apologies for the wrong forum, I really wasnt sure what one to put it in
    These numbers are odds (betting), they are for teams based on past historical data. So a team's odds start at 2.25 and if there is no change in the score after 5 minutes their odds are then 2.28 and so on, each number is an increment of 5 mins.
    The 3 lines represent some of the data I have, ideally I'd like to put in different starting odds, say 2.5, and work out what the next odds should be at the next increment.
    Hope that makes some sort of sense...

    Jon
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