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(a) Determine the equation of the estimated regression line. Temp. 174 176 177 178 178 179 180 181 Ratio 0.77 1.32 1.47 .08 1.00 1.05 0. 97 .87 Temp. 184 184 184 184 184 185 85 186 Ratio 1.54 1.65 .68 2.10 2.24 0.79 48 0.93 Temp. 186 186 186 188 188 189 190 192 Ratio 1.86 2.01 2.61 1.56 2.47 .93 1.88 3.09 The equation of the estimated regression line for tank temperature, x, and efficiency ratio, y, is * = Bo + Bix, where Bo is the y-intercept and , is equal to the slope of the line. The computational formulas for B and B, are as follows. B = [vi - BIZxi and B, = 5xx, where Sy = [x ,y, - ( [x, ) ( [ x.) and Spot = [ x 2 - ( [ *, ) 2 First, let's calculate n, [ x, [ v, [ x , ?, [ y,?, and [xx, The sample size is n = 24. The sum of the tank temperatures, \\x, = 4,404. The sum of the efficiency ratios, Vy, - 1.68125 X The sum of the squares of the tank temperatures, \\x - 808,638. The sum of the squares of the efficiency ratios is \\ 2 - 9 9016625 X The sum of the products of x,y, is xy = 48 26499999999 3