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    • Thread Starter

    Hi guys,
    I'm not sure whether this is correct the values look suspect?

    ok, question is to sketch a graph of function y= -2 log5 x

    I choose 4 x co-ords, 2,4,6 and 8. Then worked out the corresponding y
    co-ords to be.

    x y
    2 -0.8
    4 -1.6
    6 -2.4
    8 -3.2

    I calculated y by using a change of base formula. e.g. loge2/loge5 for x cord 2.

    Is this solution correct??

    *awaits with bated breath*


    Yes, that is the correct way to calculate logarithms of a different base. However your answers seem a bit weird, the numbers I got are:

    x y
    2 -0.86
    4 -1.72
    6 -2.23
    8 -2.58
    • Thread Starter

    was pressing loge on the calc rather than ln. im getting your answers too.

    Thanks for the help.
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Updated: August 3, 2004

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