Collated Data + Graphs showing relationships

Collated Data - Amount of Borax Solution:

Relationship between the amount of borax solution used and the average height of rebound of the ball:

Relationship between the amount of borax solution used and the average % rebound of the ball:

Collated Data - Concentration of Borax Solution

Relationship between the concentration of borax solution used and the average height of rebound of the ball:

Relationship between the concentration of borax solution used and the average % rebound of the ball:

I plotted graphs using both the average height of rebound of the ball and the average percentage of rebound of the ball (which used the recorded starting height of the ball), but found that the graphs using the average height of rebound of the ball were more accurate. This can be seen in the graphs above. The relationship was clearly more consistent and so this contributed to my decision to use the average height of rebound of the ball (as per 1m starting height)