: Use the linear regression formulas to find the slope (a1) and the intercept (?0) of the best fit straight line for the following data. Finally, interpolate at x=6.3    x 1 2 3 4 5 6 7 8 9 y -3.3 -7.1 -9.8 -12.3 -14 -21.4 -21.3 -28.6 -2

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