SOLUTION: Demand equation. Helen’s Health Foods usually sells 400 cans of ProPac Muscle Punch per week when the price is $5 per can. After experimenting with prices for some time, Helen has

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Question 179330: Demand equation. Helen’s Health Foods usually sells 400 cans of ProPac Muscle Punch per week when the price is $5 per can. After experimenting with prices for some time, Helen has determined that the weekly demand can be found by using the equation d = 600 - 40p, where d is the number of cans and p is the price per can.
a) Will Helen sell more or less Muscle Punch if she raises her price from $5?
b) What happens to her sales every time she raises her price by $1?
Answer by Mathtut(3670) About Me  (Show Source):
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Demand equation. Helen’s Health Foods usually sells 400 cans of ProPac Muscle Punch per week when the price is $5 per can. After experimenting with prices for some time, Helen has determined that the weekly demand can be found by using the equation d = 600 - 40p, where d is the number of cans and p is the price per can.
a) Will Helen sell more or less Muscle Punch if she raises her price from $5?
b) What happens to her sales every time she raises her price by $1?
:
:
a)400%3E600-40P---->-200%3E-40P--->5%3CP or P%3E5
:
so the number of cans sold will be equal or more as long as the price isnt raised by more than 5 dollars any price raise above 5 will produce less cans sold
:
b)every time she raises the price by one dollar the amount of cans sold falls by 40 cans