2. 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.

Table is divided into 3 sections: Year, Cars sold in millions and percent of those cars manufactured by GM.

Year--- Cars Sold (millions) X --Percent GM

1950. 6.0 50.2

1955 7.8 50.4

1960. 7.3 44.0

1965 10.3 49.9

1970 10.1 39.5

1975 10.8 43.1

1980 11.5 44.0

1985 15.4 40.11

9901 3.5 36.0

1995 15.5 31.7

2000 17.4 28.6

2005 16.9 26.9

2010 11.6 19.1

Answer the following questions.

a. Determine the correlation coefficient between the two variables. Interpret the value.

b. What is the regression model? Interpret your result.

c. How much of the variation in GM's market share is accounted for by the variation in cars sold?

d. If 14 million cars are sold, what would be GM's percent/ market share?

e. What is the range of interpolation?