The following measurements were obtained in the calibration of a pressure transducer: Determine the best-fit straight line. Find the coefficient of determination for the best fit. Solution x= voltage y= P\'\'H2O x = 8.679 y = 56.379 x2 = 9.517 xy = 61.8914 n=9 (no of data points) slope = [xy - (x.y/n)] / [x2 - {(x)2/n}] m= slope = 6.5 y intercept = c = (y/n) - m.(x/n) c= (find c) use c and m in the equation y=mx + c to get the equation, y and m are any data points.