A marketing firm wished to determine whether the number of television commercials broadcast was linearly correlated with the sales of its product. The data, obtained from each of several cities, are shown in the following table. City A B c D E C mmerc ,0 17 6 9 15 11 ials,X I 5a ,es 9 5 10 12 12 14 6 10 11 9 Units, y 1. Calculate SS(X) 2. Calculate SS(y) 3. Calculate SS(xy) 4. The linear correlation coefficient, r 5. The slope, b1 6. The y-intercept, b0 7. The equation of the line of best fit