What does the slope of the graph tell us in the situation? A. It tells us that there is a fixed cost of approximately $35 for ordering hats.

B. It tells us the amount that the total cost increases for each additional hat ordered.

C. It tells us that when 9 hats are ordered, the total cost is approximately $160.

D. It tells us that when the number of hats ordered increases by 10, the total cost increases by approximately $175.