Running speed versus length: The following table gives the length L, in inches, of an animal and its maximum speed R, in feet per second, when it runs.21 (For comparison, 10 feet per second is about...

Running speed versus length: The following table gives the length L, in inches, of an animal and its maximum speed R, in feet per second, when it runs.21 (For comparison, 10 feet per second is about 6.8 miles per hour.)

a. Does this table support the generalization that larger animals run faster?

b. Plot the data points. Does it appear that running speed is approximately a linear function of length?

c. Find the equation of the regression line for R as a function of L, and explain in practical terms the meaning of its slope. (Round regression line parameters to two decimal places.) Add the plot of the regression line to the data plot in part b.

d. Judging on the basis of the plot in part c, which is faster for its size, the red fox or the cheetah?