A random sample of 9 statistics students produced the following data, Midterm Exam Score, x Final Exam Score, y 18 87 84 75 48 10 22 60 46 60 92 46 69 33 93 45 28 60   where x measures the midterm exam score and y measures the final exam score. What is the estimate of the y = a x + b regression slope coefficient?

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