1. The problem asks for the rate of change in boxes of cookies sold between Thursday and Friday. 2. The rate of change formula is: $$\text{Rate of change} = \frac{\text{Change in boxes}}{\text{Change in days}} = \frac{y_2 - y_1}{x_2 - x_1}$$ 3. From the table: - Thursday (day 3) boxes sold: $70$ - Friday (day 4) boxes sold: $55$ 4. Calculate the change in boxes: $$55 - 70 = -15$$ 5. Calculate the change in days: $$4 - 3 = 1$$ 6. Substitute into the formula: $$\frac{-15}{1} = -15$$ 7. The rate of change is $-15$ boxes per day, meaning the number of boxes sold decreased by 15 from Thursday to Friday.