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Thread: [SOLVED] in DESPERATE need of exponential help

  1. #1
    ss4vegeta500
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    [SOLVED] in DESPERATE need of exponential help

    okay. this is my assignment. pleeeeasse anybody help me out here. at least with the first part.
    please...i really just need to know how to get it started. someone told me pick 2 points and plug them in the y=ae^(bx) formula...but then im supposed to have 2 formulas and 2 unknowns, and then substitute and get one? i am clueless

    Last edited by ss4vegeta500; Sep 20th 2007 at 06:27 PM. Reason: changed text
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  2. #2
    MHF Contributor
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    I'm not sure I'd use first and last on this one. My preference would be least square on th elogs of the data, but that is a discussion for another day, I suppose.

    Why not use your hint just as it has been given? Actually, I'm a little nervous about the beginning of this chart. The spacing of the horizontal axis is pretty vague at the beginning. My inclination is to go with 1950 since it can be identified.

    Two points: (1950,200)? You judge. and (2000,1500)?

    Now substitute. $\displaystyle 200 = a*e^{b*1950}$ and $\displaystyle 1500 = a*e^{b*2000}$ and hopefully you are on your way.
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