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

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. Homework Help ✎*y*= 49 – 8.4*x*

*r*= –0.903Interpret

*R-*squared in context.Interpret the slope in context.

First calculate *R*^{2} (*r*^{2}). Note that *R*^{2} % 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 _______.

81.5

fuel efficiency

weight

Think about the units for the slope in this situation.