The following table compares U.S. population (millions) with U.S. per-capita consumption of bottled water (gallons).
Source: Bureau of the Census, Statistical Abstract of the United States 2009, pp. 10, 134.
a. Determine the least-squares regression line for pre- dicting the percentage of males who are overweight based on the number of calories consumed per day.
b. Calculate and interpret the values of r and r2.
c. If a nation's males were to consume an average of 3000 calories per day, what would be the predicted percentage of the nation's males who are overweight?