Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (–1 i) (21 5i)?

The ages in years of 10 men and their systolic blood pressures in mm are shown inthe attached dat table with a sample correlation coefficient r of 0.906 remove the data entry for the man who is 49 and has a systolic blood pressure of 200 mm of mercury from the data set and find the new correlation coefficient. describe how this affects the correlation coefficient r the new correlation coefficient r? going from 0.906 to?