Suppose you have a cookie stand, and when you charge $3 per cookie box you sell 200 boxes. But when you raise your price to $4 you only sell 120 boxes.

a. Write an equation for the number of boxes you sell as a function of the price you charge.

b. Denote "B" for number of boxes, and "P" for the price you charge.

c. Assume the function is linear

Question

Suppose you have a cookie stand, and when you charge $3 per cookie box you sell 200 boxes. But when you raise your price to $4 you only sell 120 boxes.

a.   Write an equation for the number of boxes you sell as a function of the price you charge.

b.   Denote "B" for number of boxes, and "P" for the price you charge.

c.   Assume the function is linear

anonymous · Answer

because it's linear: Change in boxes/change in price = slope 

200-120/(3-4) = 80/-1=-80

B-200=-80(P-3)

anonymous · Answer

Thanks