3. The table below gives the estimated world population (in billions) for various years. Make a
 scatterplot of the data (labeling and scaling axes appropriately) and provide the regression
 equation.
 Year
 1980 1990 1997 2000 2005 2011
 Population 4400 5100 5852 6080 6450 7000
 Using the linear regression equation predict the world population in the year 2015.