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5-24.
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 – 8.4x |
r = –0.903 |
Calculate and interpret 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.