ramaco sh -FRE-CALCULLIS The size of the total debt owed by the United States federal government continues to grow. According to the Department of the Treasury, the debt per 6 person living in the United States is approximately $63, 720 (or over $172,000 per U.S. household). The following data represent the U.S. debt for the years 2007-2017. Since the debt D depends on the year y, and each input corresponds to exactly one output, the debt is a function of the year, so D(y) represents the debt for each year y: Year (y) Debt D(y) in $ billions MacBook Air