1. Consider the entries presented in the table below, which represented one estimated of the world's population levels over the period 1750 to 1920:
Year AD (t)
|
Population size x (in billions)
|
1750
|
0.79
|
1800
|
098
|
1850
|
1.26
|
1900
|
1.65
|
1950
|
1.75
|
1920
|
1.86
|
Provide a semi-log plot of the points (t, in x) and find and graph the best-fitting line through these points on the same plot. From this line, provide an estimated of the average growth rate exponent r for the population size function x(t) = cert over this 170-year period.
2. Consider the entries presented in the table below, which represented one estimated of the world's population levels over the period 1920 to 2010:
Year AD (t)
|
Population size x (in billions)
|
1920
|
1.86
|
1930
|
2.07
|
1940
|
2.30
|
1950
|
2.52
|
1960
|
3.02
|
1970
|
3.70
|
1980
|
4.44
|
1990
|
5.27
|
1999
|
5.98
|
2010
|
6.86
|
Provide a semi-log plot of the points (t, ln x) and find and graph the best-fitting line through these points on the same plot. From this line, provide an estimate of the average growth rate exponent r for the population size function x(t) = cert over this 90-yerar period.