Compute the slope for the straight-line graph shown in Exercise. (Be sure to include unit...

Compute the slope for the straight-line graph shown in Exercise. (Be sure to include units as part of your answer.)

Exercise

The following straight-line graph summarizes the data for world cigarette production over the years 1990–1993. Specify At and AN for the period 1990–1993. (Include units with each answer.)

World cigarette production, 1990–1993.

Adapted from data compiled in Vital Signs, 1998, Lester R. Brown et al. (New York: W. W. Norton&Company, 1998)