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?

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