This is for an experimental physics homework,I am using the latest version of MS Excel. I have a set of data, I perform linear regression on them and it gives me a line y=ax + b. Given that both a and b have physical significance I would like to know how could I know the uncertainty associated with both a and b, so I could get meaningful results. How do I do this? The statistics pack seems to give everything but these values. Any help would be appreciated.