\f2009 4.6 17.2 2010 4.6 17.5 2011 5.0 2012 5.0 2013 5.0 Source: World Bank a. Compute the least-squares regression line for predicting U.S. emissions from non-US. emissions. 1). If the non-US. emissions differ by 0.2 from one year to the next, by how much would you predict the US. emissions to differ? c. Predict the U.S. emissions for a year when the non-US. emissions level is 3.4. Page 130 24. Carbon footprint: Carbon dioxide (C02) is produced by burning fossil fuels such as oil and natural gas, and has been connected to global warming. The following table presents the average amounts ( in metric tons) of C02 emissions for the years 19922013 per person in the United States and per person in the rest of the world. Year Non-U.S. U.S. 1997 3.4 20.0 1998 3.3 1999 3.2 2000 3.3 2001 3.3 2002 3.3