Cant solve question below

Question

The population of Abnerville was 12,500 people in 1950. In 2000, the population was 250,000. Find the average rate of increase in the population over the 50 year period.

Answer 1

You have two points, (1950, 12,500) and (2000, 250,000).  The average growth rate is the slope of the line connecting the two points:

 

slope = (y₂-y₁)/(x₂-x₁) = (250,000 - 12,500)/(2000 - 1950) = 237,500/50 = 4750 people per year