1. The problem statement, all variables and given/known data I am doing a lab report and I have to find the slope of a graph as well as the max and min lines of the graph. I also have to find the error in the slope. I have calculated the slope. My first problem is in calculating the error lines. My teacher said i must find the slope using just my graph and not my data, meaning when i use the slope formula i cant use my data as the points I use but must use other points on that line. So I did that and got the slope. But to find the slope of the max and min lines I am confused because due to the way i obtained the data, the error in x is the same for all points and the error in y is the same for all points. wouldnt this mean that the slope of the max and min lines will be both be the same as the slope? (because lets say the points are (3 +/-1, 4 +/-2) and (5+/-1, 6 +/- 2) then the slope of the line would be (6-4)/(5-3) = 2/2 = 1 and the slope of the max line would be (8-6)/(6-4) = 2/2 = 1 . I was going to use the following formula for the error of my slope : (max slope - min slope)/2 but now I am confused.