# SOLUTION: Helen's Health food usually sells 400 cans of Propac per week while price is \$5.00 per can. After playing with prices for awhile Helen has determined that the weekly demand can be

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 Click here to see ALL problems on Graphs Question 146074: Helen's Health food usually sells 400 cans of Propac per week while price is \$5.00 per can. After playing with prices for awhile Helen has determined that the weekly demand can be found by using this equation: D=600-40P where d is cans and p is price per can Will Helen sell more or less Propac if she raises the price? What happens to her sales every time she raises her price by \$1?Answer by stanbon(57214)   (Show Source): You can put this solution on YOUR website!Helen's Health food usually sells 400 cans of Propac per week while price is \$5.00 per can. After playing with prices for awhile Helen has determined that the weekly demand can be found by using this equation: D=600-40P where d is cans and p is price per can. Will Helen sell more or less Propac if she raises the price? What happens to her sales every time she raises her price by \$1? -------------- The slope of the equation is -40 That means the number of cans sold decreases by 40 for every increase of one dollar in the price. Try p=0 and then p=1 and see how D changes by -40. -------------- Cheers, Stan H.