For each equation, state the x-intercept and y-intercept. Then graph the equation using the intercepts and a third point.

Helen's Health Foods usually sells 400 cans of ProPac 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 te 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?

c)Graph the equation.

d)What is the maximum price that she can charge and still sell at least one can?

Helen's Health Foods usually sells 400 cans of ProPac 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 te 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?

c)Graph the equation.

d)What is the maximum price that she can charge and still sell at least one can?

## This question was asked on Apr 18, 2010.

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