(3.) [20 Points] Basketball fans are quite enthusiastic about various statistics. One question that arises frequently is whether there is a relationship between a player's free throw success rate and his salary. The data for three NBA players is: Free Throw Percenta- _e Salar ($M) Using the equations derived in class (no computers yet), answer the following questions by performing the appropriate calculator calculations: (a) Calculate the sample average for both variables. (b) Perform a simple linear regression -- what equation best links the dependent and independent variables? (0) Show that this result holds for the general case. When there is no relationship between the dependent and independent variables, (slope = O) the intercept equals the average of the dependent variable