Final answer:
The rate of change in the cost of paper sheets for Amanda is $0.35 per additional sheet. This was calculated by taking the change in cost of $1.05 and dividing it by the change in quantity of 3 sheets.
Step-by-step explanation:
The question asks us to calculate the rate of change in the cost of paper sheets purchased by Amanda. To find the rate of change, we need to divide the change in cost by the change in the quantity of paper sheets.
The change in the quantity of paper sheets is 13 sheets - 10 sheets = 3 sheets. The change in cost is $4.55 - $3.50 = $1.05. Therefore, the rate of change is $1.05 ÷ 3 sheets = $0.35 per sheet. This means that the cost per sheet increases by $0.35 for each additional sheet purchased.