11.4 The following data ware colloctod to dotarmine the rolationship botwoon pressure and the correspond- ing scale reading for the purposo of calibration. Pressuro, z (lb/sq In.) Salo Randing, y 10 13 10 10 10 10 50 18 16 15 20 86 90 50 50 50 50 88 88 92 (a) Find the equation of the regression line.

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