A 3. The American black bear is the smallest North American bear. Below is a table of lengths and weights of black bears. A scientist would like to find a least squares regression line, treating the length as the explanatory variable (x) and weight as the response variable (y). Length in cm Weight in kg 139.0 100 138.0 70 139.0 90 120.5 60 149.0 85 141.0 100 141.0 95 150.0 85 166.0 155 151.5 140 129.5 105 150.0 110 a) Determine the linear correlation coefficient (r) between length and weight. b) Using your calculator. determine the slope (b,) of the least squares regression line c) Using your calculator, determine the y intercept (b