Hi All

Thanks for your previous help Ackbeet. Now I have the following data.

data.txt

I wish to fit a power law curve to it of the following type (first equation).

I am particularly interested in getting the exponent n. However, doing as in second and third equations above, I get variable n (y and x do not get linear even on log scale). I was expecting a constant value like in half life. Any suggestions?

Thanks.