Crutch Length Each year 15 million people have foot and ankle problems. Many times they need crutches. The formula f(x) = 0.72x + 2 calculates the appropriate crutch length in inches for a person with a height of x inches. (Source: Journal of the American Physical Therapy Association.)
(a) Find the crutch length for a person 6 feet 3 inches tall.
(b) For each 1-inch increase in height, by how much does the recommended crutch length increase?
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