The given quantities below were calculated from a sample data set. Σ x = 192 Σ x² = 2408 Σ3 = 226 Σ y² = 3306 Σxy = 1914 n = 21 Determine the least squares regression line. Round values to four decimal places, if necessary. ŷ Determine the correlation coefficient. Round the solution to four decimal places, if necessary. r =