premise: Atlanta metropolitan area had a population of 5.5 million people.
hypothesis: Atlanta . Atlanta is the cultural and economic center of the Atlanta metropolitan area , home to 5,710,795 people and the ninth largest metropolitan area in the United States . Atlanta metropolitan area . Its economic , cultural and demographic center is Atlanta , and it had a 2015 estimated population of 5.7 million people according to the U.S. Census Bureau . The Combined Statistical Area spans up to 39 counties in north Georgia and had an estimated 2015 population of 6.3 million people .