Chapter 8, Problem 6E

To determine

To explain what the slope means.

Explanation of Solution

It is given in the previous question that, we examined in previous exercise about the relationship between the fuel economy in mpg and horsepower for models of cars. Thus, the analysis produced the regression model for the same:

  $\text{<mover accent="true"><mo>m</mo><mo>^</mo></mover> pg}=46.87-0.084\text{HP}$

Thus, the slope of $-0.084$ indicates that a one unit increase in the horsepower leads to a $0.084$ mpg decrease in the fuel economy.