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Find an equation of the least squares regression line based

A Biology instructor believes that the average quiz score is a good predictor of final exam score. A random sample of 10 students produced the following data where x is the average quiz score and y is the final exam score.

x 80 50 60 100 70 85 40 65 75 90

y 72 60 55 90 60 85 35 60 78 95

(a) Find an equation of the least squares regression line.

(b) Based on the equation from part (a), what is the predicted final exam score if the average quiz score is 95?

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