Answer
The rate of change is found by finding the change in y over the change in x, in this case the change in the height of the water over the number of marbles being added. This is shown by the equation $ \frac{7.5-6.9}{5-3} $. This result gives us a value of 0.3. Due to a constant rate of change, it is important to know in application that this means each marble will add the same amount of height to the water in the glass.
Work Step by Step
Explanation above.
