Your school is trying to refine its textbook budget. The following table shows the average cost of college textbooks required for the general education courses at your college. Let y be the curriculum year and x be the average cost of a textbook. Find the formula for the least squares line that fits this data. a.  y ̂=−3,349−1.887x b.  y ̂=−3,675−1.87x  c. y ̂=−3,675+1.87x d.  y ̂=−3692+1.77x

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