cars sold for an 8-week period at a car dealership. Use your calculator to answer the following questions. Round all coefficients to four decimal places. Advertisements 5 20 0 14 25 16 28 18 Cars sold 15 31 12 18 28 20 42 25 . Determine the correlation coefficient between the number of weekly television advertisements and the number of cars sold. (+3 points) Determine whether a correlation exists at a = 0.05, and what does that mean? Determine the equation of the line of best fit for the number of weekly television advertisements and the number of cars sold