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

  1. 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. Homework Help ✎

  2. y = 49 – 8.4x
    r = –0.903

    1. Interpret R-squared in context.

    2. Interpret the slope 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

Think about the units for the slope in this situation.