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A lazy employee at an off-campus second-hand bookstore has decided that, rather than go searching through the book to find the correct price, he will
A lazy employee at an off-campus second-hand bookstore has decided that, rather than go searching through the book to find the correct price, he will start pricing the books in relation to how thick they actually are. A sample of 10 books, ranging in thickness from 1 cm to 6 cm, gave the following results for thickness (x, in cm) and price (y, in $): Sxy = 87, Sxx = 24, Syy = 358.9, x = 30, and y = 261. What is the predicted price of a textbook that is 1 cm thick?
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$26.10
$22.48
$33.35
$18.85
$29.73
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