Sketch a scatter plot that could represent data from each of the following. Label the axes to indicate the independent and dependent...

Sketch a scatter plot that could represent data from each of the following. Label the axes to indicate the independent and dependent variable.

a.    People's ages (starting at 40) and their vision.

b.    Number of registered vehicles and the cost of gasoline.

c.    Number of jobs and population.

d.    Number of trees and risk of a forest fire.

e.    Time spent exercising and calories burned.