SOLUTION: The Wikipedia (http://en.wikipedia.org/wiki/World_population) reports that the world population is 6.8 and is projected to be 9 billion by 2040. If these figures are correct, what

Question 511020: The Wikipedia (http://en.wikipedia.org/wiki/World_population) reports that the world population is 6.8 and is projected to be 9 billion by 2040. If these figures are correct, what is the yearly population growth rate? If this growth rate were historically correct, what is the predicted population for the year 1 AD?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
A 2.2 billion gain in 29 years would average out to 758 million people per year.

If population growth was linear, the population in 1 AD would have been (6.8*10^9) - 2010(7.58*10^7), roughly -140 billion. Does that make sense?

This is why most linear regressions do not work for predicting extremely small or extremely large x-values.
RELATED QUESTIONS
The population of the world in 1987 was about 5 billion, and the relative growth rate was (answered by josgarithmetic)

The world population is projected to be 7.6 billion in 2043. At that time, there are... (answered by ewatrrr)

According to Wikipedia, the population of China is 1,362,080,000 and the population of... (answered by solver91311)

the world population is projected to be 6.6 billion 2040.at that time there are expected... (answered by stanbon)

The world population is projected to be 8.8 billion in 2045. At that time, there... (answered by ikleyn)

The population of the world in 1987 was 5 billion and the growth rate was estimated at 7... (answered by josgarithmetic)

Since 1950, the world population has risen from 2.5 billion at a rate of 1.8% per year.... (answered by greenestamps)

PLEASE HELP ME ! According the United nations population statistics , the world... (answered by Theo)

in the year 2000 the population of the world was 6.1 billion. the doubling time is 20... (answered by ikleyn)