Hi guys, So I'm writing up a physics lab and I have a bunch of data points. All of these data points have both x and y error bars. The relationship between x and y is linear and so I've made a line of best fit using Python passing through the data. Now the slope of that line of best fit has physical significance and I need to know its value. Of course I know the gradient of this line but what I don't have is the uncertainty in this gradient - which I need. How can I go about calculating it? Thanks!