In a controlled experiment, researchers studied the impact of different concentrations of a sugar solution on the rate of osmosis in plant cells. They used potato slices as the model to observe the change in mass after immersing the slices in solutions of varying sugar concentrations (0%, 5%, 10%, and 15%). After 24 hours, the following data was collected for the change in mass of the potato slices (in grams):

Concentration (%): 0, 5, 10, 15

Change in Mass (grams): +2.5, -1.0, -3.5, -4.0

Based on this data, which of the following conclusions can be drawn regarding the relationship between sugar concentration and the rate of osmosis?