For Exercises 65-68, use the following graph, which shows the annual heart attac

Question

For Exercises 65-68, use the following graph, which shows the annual heart attack rate per 10,000 men as a function of blood cholesterol level.* Approximate the annual heart attack rate for those men whose blood cholesterol level is 225 mg dl. That is, find H(225). Approximate the annual heart attack rate for those men whose blood cholesterol level is 275 mg/dl. That is, find H(275). Approximate the blood cholesterol level for an annual heart attack rate of 100 attacks per 10,000 men. That is, find x for which H(x) = 100. Approximate the blood cholesterol level for an annual heart attack rate of 50 attacks per 10,000 men. That is, find x for which H(x) = 50.

Explanation / Answer

Go to the point on the y-axis that represents 100 attacks
Go horizontal until you intersect the curve.
Go straight down From that point until you intersect the x-axis.
The value at which you intersect the x-axis is your answer
So the answer is 250

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