The population of Botswana (in millions) for the years 1970
to 2020 is given in the table.
Year 1970 1980 1990 2000 2010 2020
Population, P 0.628 0.898 1.287 1.643 1.987 2.254
(a) Make a scatter plot (population versus years) for the data. [3]
(b) Using the scatter plot determine the data trend and law of the curve of
best fit for the data. [3]
(c) Use the least squares method find the curve of best fit for the data. [11]
(d) Hence estimate the population of Botswana in the year 2036. [3]
