Can I change the base number in y=c*b^x ?

Hi,

I have some data (x,y) and I plotted its graph in excel, and added a trendline which is defined by

$\displaystyle y = c*exp(x)$

but my claim was $\displaystyle y = c * 2^x$ and I don't know how to make the line equation power of 2 instead of e.

So, does this (exp) equation implies that my claim was true?

I mean is it sufficient to show $\displaystyle y = c * (some\_base)^x$?

Re: Can I change the base number in y=c*b^x ?

Hey publicvoid.

Recall that (e^ln(a))^x = a^x = e^(x*ln(a)) so using a substitution z = x*ln(a) you can get a^x by using f(z) = e^z where z = x*ln(a).