Complete parts (a) through (h) for the data below. X 3 4 5 7 8 y 11 18 21 (b) Find the equation of the line containing the points (3,6) and (8,21). y = X + (Type integers or simplified fractions.)\f(d) By hand. determine the least-squares regression line. =l:ix+(D) (Round to three decimal pieces as needed.) (1) Compute the sum of the squared residuals for the line found in part (b). (Round to three decimal places as needed.) (g) Compute the sum of the squared residuals for the least-squares regression line found in part (d). (Round to three decimal places as needed.) (h) Comment on the fit of the line found in part (b) versus the least-squares regression line found in part (d). The line in part Dasses through the most points. The line in part the sum of the squared residuals, thus being the