Why is the rebound ratio useful for testing sports balls?

It provides a consistent measure of bounciness regardless of the drop height.

Calculating Rebound Ratio Lesson Plan for Grade 9th Grade

Name: Calculating Rebound Ratio
Author: Insta~Lesson

I can calculate the rebound ratio of an object.

1
The rebound ratio is calculated by dividing the rebound height by the drop height.
2
A basketball referee tests the inflation of a basketball by dropping it and observing if it bounces back to their elbow, which is about 3/4 of their height.
3
If a basketball has a rebound ratio of 0.743 and is dropped from 97 inches, we can expect it to rebound approximately 72 inches high.