The scatterplot shows the gross domestic product (GDP) of the United States in trillions of 2009 dollars plotted against years since 1950.

A linear model fit to the relationship looks like this:

a) Does the value 96.9% suggest that this is a good model?
b) Here’s a scatterplot of the residuals. Now do you think this is a good model for these data?

Transcribed Image Text:

GDP ($T) 16 12 8 4 0 + 15 + 30 Years since 1950 45 ***** 60