1. The problem statement, all variables and given/known data The diagram shows the impact of 20 projectiles launched at the same speed and angle. What is the uncertainty in the impact position? (see attached file for picture of diagram) 2. Relevant equations No equations, my lab instructor said through an email that I can get it "just by looking at the dots". 3. The attempt at a solution At first I tried to find the slope of the line of best fit, but that wasn't the answer. I am just completely lost of what I am supposed to do. I know I can find it just by looking at the diagram, and it's frustrating because I know the problem is simple. I am just not sure what I'm looking for. Anyone have any ideas?