Business: 3D movies The number of 3D movie screens in the United States in recent years...

Business: 3D movies The number of 3D movie screens in the United States in recent years is shown in the following table. Year

a. Number the data columns with x-values 1– 4 (so that x stands for the number of years since 2008) and use linear regression to fit a line to the data and state the regression formula. [Hint: See Example 9 on pages 14 –15.]

b. Interpret the slope of the line.

c. Use the regression line to predict the number of 3D movie screens in the year 2020.