Access the UN data file (shown in Table 3.9) at the text website from 42 countries. Let y = carbon dioxide emissions (metric tons per capita) and x = gross domestic product (per capita GDP, in dollars).

(a) Find the prediction equation, and interpret the coefficients.

(b) For the United States, x = 50.9 and y = 17.0.

Find the predicted CO2 value. Find the residual, and interpret.