Exercises 23 and 24 are based on the following table comparing the number of registe...

Exercises 23 and 24 are based on the following table comparing the number of registered automobiles, trucks, and motorcycles in Mexico for various years from 1980 to 2005.

Automobiles and Motorcycles in Mexico

a. Use x = Number of automobiles (in millions) and y = Number of motorcycles (in millions), and use technology to obtain the regression equation and graph the associated points and regression line. Round coefficients to two significant digits.

b. What does the slope tell you about the relationship between the number of automobiles and the number of motorcycles?

c. Use technology to obtain the coefficient of correlation r. Does the value of r suggest a strong correlation between x and y?