Based on the information provided from the graph, the best conclusion that can be drawn about the US economy is:
The economy suffered a setback in 2009 before rebounding in 2010.
This is because the GDP was at negative 3 percent in 2009, and then improved to negative 2.3 percent in 2010, indicating a recovery from the initial setback. While the GDP was still negative in 2011, the trend shows that the economy was improving from 2009 to 2010.