• The table below shows the number of cars (in millions) sold in the United States for various years and the percent of those cars manufactured by GM.Year Cars Sold (millions) Percent GM Year Cars Sold (millions) Percent GM1950 6.0 50.2 1980 11.5 44.01955 7.8 50.4 1985 15.4 40.11960 7.3 44.0 1990 13.5 36.01965 10.3 49.9 1995 15.5 31.71970 10.1 39.5 2000 17.4 28.61975 10.8 43.1 2005 16.9 26.9Lin01803_ch13_461-511.qxd 11/3/10 4:38 PM Page 501Correlation and Linear Regression 501Use a statistical software package to answer the following questions.a. Is the number of cars sold directly or indirectly related to GM’s percent of the market? Draw a scatter diagram to show your conclusion.b. Determine the correlation coefficient between the two variables. Interpret the value.c. Is it reasonable to conclude that there is a negative association between the two variables? Use the .01 significance level.d. How much of the variation in GM’s market share is accounted for by the variation incars sold?