=+57. GDP 2013. The scatterplot shows the gross domestic product (GDP) of the United States in trillions of dollars plotted against years since 1950.

12 9

6 3

GDP 1950 1965 1980 1995 2010 Year A linear model fit to the relationship looks like this:

Dependent variable is: GDP($T)

R squared = 96.7% R squared (adjusted) = 96.7%

s = 0.6874 with 64 - 2 = 62 degrees of freedom Variable Coefficient SE(Coeff) t-ratio P-value Intercept -387.843 9.217 -42.1 60.0001 Year 0.199268 0.0047 42.8 60.0001