Dean made a statistical estimation of the cost output relationship for a shoe store The data for the firm is given in the following table 4 57 9 10 15 20 33 50 y3 3 3 3 4 3 5 4 5 5 5 7 5 12 Here x is the output in thousands of pairs of shoes and y is the cost in thousands of dollars Use 4 decimal places A Determine the best fitting line using least squares S x 2 B Determine the best fitting quadratic using the least squares and the square of the correlation coefficient S x