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Home > CCA > Chapter 6 > Lesson 6.2.5 > Problem 6-110


Consumer Reports magazine collected data for the fuel efficiency of cars (miles per gallon) compared to weight (thousands of pounds). The regression model below was created.

  1. Interpret R-squared in context.

    First calculate R2 (r2). Note that R2 % is the amount of variability that can be explained by a linear relationship.

    _____ percent of the variability in __________ can be explained by a linear relationship with _______.

    fuel efficiency

  2. Interpret the slope in context.

    Think about the units for the slope in this situation.