IB Physics-Topic1- Qc#3-Measurements and Uncertainty-Paper 2-A student folds paper into cylinders

In an investigation a student folds paper into cylinders of the same diameter D but different heights. Beginning with the shortest cylinder they applied the same fixed load to each of the cylinders one by one. They recorded the height H of the first cylinder to collapse. They then repeat this process with cylinders of different diameters.
The graph shows the data plotted by the student and the line of best fit.
Theory predicts that H = cD^(2/3) where c is a constant.
Suggest why the student’s data supports the theoretical prediction.
Determine c. State an appropriate unit for c.
Identify one factor that determines the value of c.

Topic 1-Measurments and Uncertainty paper 2- Playlist