Which indicator shows how well a regression line fits through the scatter of data points?

In the above diagram, what happens if the real GDP is $3 trillion? $5 trillion? $7 trillion? What is the equilibrium level of real GDP? Why?

What will be an ideal response?

In July 2008, the Federal Communications Commission approved the merger of satellite radio providers XM Satellite and Sirius Satellite Radio, establishing a single satellite radio company in America. The deal is tough for many to swallow

"We continue to believe that consumers are best served by competition rather than monopolies," said National Association of Broadcasters Vice President Dennis Wharton. What does Wharton argue? A) Producer surplus is greater with competition. B) Total surplus is greater with a monopoly. C) Consumer surplus is greater with competition. D) Prices are lower with a monopoly.