The line graph illustrates the growth of world population from the year 1800 to the projection in 2100 and the bar graph shows the populations of two different regions within a twenty-five-year period.
Overall, it is evident that the population on global scales and developing regions is expected to increase continuously throughout the period, whereas the number of residents in developed regions is predicted to remain constant.
In 1800, there were about a billion people living on earth, a figure which rose consistently over another century and by 1960, the world had gained three times the population in 1800. After 1960, this number increased more rapidly, with a projected peak of 8 billion by 2040. However, after six decades, this figure is estimated to decline by 2 billion.
Regarding urban populations, in 2015, developing regions had a total of 2.2 billion of people and is predicted to grow at a constant rate, reaching 4 billion by 2040. Nonetheless, the population of developed regions plateaued at around 1.3 billion.