The following table shows the number of weekly television advertisements and the number of cars sold for an 8-week period at a car dealership.

(a) Determine the correlation coefficient between the number of weekly television advertisements and the number of cars sold. 

(b) Determine whether a correlation exists at α = 0.05. 

(c) Determine the equation of the line of best fit for the number of weekly television advertisements and the number of cars sold.

Round both m and b the nearest hundredth.

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0 14 25 16 28 18 10 16 28 20 40 25 Advertisements 6 20 Cars sold 15 31