The numbers of countries requiring picture warnings on cigarette packages are shown in Table 45 for various years.
Table 45
Numbers of Countries requiring Picture Warnings on Cigarette Packages
Year Number
2010 …………………..34
2011 …………………..40
2012 …………………..55
2013 …………………..63
2014 …………………..70
2015 …………………..77
a. Construct a time-series plot.
b. We can find the average rate of change of the number of countries requiring picture warnings on cigarette packages by dividing the change in the number of such countries for the period 2010–2015 by the change in time for the same period. Find the average rate of change.
c. For which 1-year periods does your result in part (b) underestimate the change in the number of countries requiring picture warnings on cigarette packages?
d. For which 1-year periods does your result in part (b) overestimate the change in the number of countries requiring picture warnings on cigarette packages?