Final answer:
The relationship is proportional because the change in height for both blocks consistently reflects their original heights, maintaining a steady rate of change.
Step-by-step explanation:
To determine if a function is proportional, we must identify if there is a constant rate of change. The question provides us with an example related to Block A and Block B. Proportional relationships involve variables that change at a constant rate. If the change in height is proportional to the original height, as stated, it means that for any increase in the original height, there is a corresponding steady increase in the change in height.
The information specifies that the original height of Block B is twice that of Block A, and in turn, the change in height for Block B is twice that of Block A. This consistency confirms that the relationship is proportional, as the rate of change remains steady. Therefore, the response to whether this function is proportional would be Yes.