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QUESTION
(1 point) The table gives the population of the world in the 20th century.
Year1960,1970,1980,1990,2000
Population (in millions)3040,3710,4450,5280,6080
(a) Estimate the rate of population growth in 1920 by averaging the slopes of two secant lines (using the years 1910 and 1920, then 1920 and 1930).
Answer: ? million/year
(b) Repeat the same process for 1980.
Answer: ?million/year
