The population of a country is expected to drop by 30% over the next 50 years as the percent of its citizens that are elderly increases. Projections for the country's population through 2050 are shown in the table. Year, t 2005 2010 2020 2030 2040 2050 Population, P (in millions) 127.8 127.3 124.1 117.6 109.5 100.6 (b) Use the regression feature of a graphing utility to find a linear model for the data. (Round your numerical values to two decimal places.) P =   (c) Identify the slope of the model from part (b). (Round your answer to two decimal places.)(d) Use the linear model to predict the population in 2015, 2035, and 2060. (Round your answers to one decimal place.)Are these predictions reasonable?

Question

The population of a country is expected to drop by 30% over the next 50 years as the percent of its citizens that are elderly increases. Projections for the country's population through 2050 are shown in the table.

Year, t 2005 2010 2020 2030 2040 2050
Population, P (in millions) 127.8 127.3 124.1 117.6 109.5 100.6

(b) Use the regression feature of a graphing utility to find a linear model for the data. (Round your numerical values to two decimal places.)
P =
 


(c) Identify the slope of the model from part (b). (Round your answer to two decimal places.)



(d) Use the linear model to predict the population in 2015, 2035, and 2060. (Round your answers to one decimal place.)

Are these predictions reasonable?
 

 

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