Question

in 2000 , the population of metropolis was 55556 . by 2011 , the population had grown to 72760 . assuming linear growth, what will the population be in 2030 ?

Answer 1

102,476

Explanation:

If a population grows linearly from 55556 in 2000 to 72760 in 2011, you want the predicted value in 2030 assuming growth continues to be linear.

Proportion

The change in population is proportional to the change in years:

(72760 -55556)/(2011 -2000) = (p -55556)/(2030 -2000)

p = 30(17204)/11 +55556 . . . . . . solve for p

p = 46920 +55556 = 102,476 . . . . . . do the arithmetic

The population in 2030 will be $102,476.