What is shown on the y-axis in a graph if it is mean distance paintballs traveled?

Answer 1

It's not entirely clear what graph you are trying to draw. My guess is that a paintball gun has been set at a fixed angle and lots of paintballs have been fired and the distance they travelled recorded.

As the distance is a continuous, not a discrete, measure and there is going to be a little inaccuracy in the actual measurement of the distances, it is going to be better to group the distances to the nearest 5 or 10 cm (eg less than 30m, 30m to 30.09 m, 30.1m to 30.19 m, ..., 32.9m to 32.99m, 33 m and over - the actual group range to use would be based on the data recorded).

Then, the graph would plot the mid-point of the distance groups along the x-axis and the number of paintballs in the groups up the y-axis. I would expect a roughly bell shaped curve to appear (if the points are joined together) like the Normal curve. The mean value of the distances (taking into account how many in each group) I would expect to be near the middle of the graph (x-values).