How do I graph Log base 2 of x on a calculator?

Question

I'm not quite sure how to graph this on the calculator. I just can't figure out how to change from log base 10 to log base 2.

Answer 1

Use change of base formula

e.g. logx = (lnx)/(ln10)

Answer 2

A simple logarithm formula:

logx(y)=logm(y)/logm(x)  [logx(y) denotes logarithm of y to the base x]

where "m" is a certain number which remains unchanged.(m≠1)

A calculator defines "10" as the default base of the logarithms it computes. Thus,input the problem this way:

log(x)/log(2)                  

The calculator will by default assume the base of the logarithms to be 10,that implies that in this case,the value of the certain number "m" is "10".

The value of "x" will determine the output. :)