# Population Growth

Pages: 14 (3077 words) Published: March 11, 2013
Population Growth

Population Data

The table below shows the population data for England and Wales between the years of 1801 and 1951. Census was not taken in 1941 because of the Second World War.

|Year |Population | |1801 |8,892,536 | |1811 |10,164,256 | |1821 |12,000,326 | |1831 |13,896,797 | |1841 |15,914,148 | |1851 |17,927,609 | |1861 |20,066,224 | |1871 |22,712,266 | |1881 |25,974,439 | |1891 |29,002,525 | |1901 |32,527,843 | |1911 |36,070,492 | |1921 |37,866,699 | |1931 |39,952,377 | |1951 |43,757,888 |

The graphics display calculator (GDC), Ti-84 Plus, was used to make a plot of population against time. The years were entered into the L1 column to represent the x-axis and the population was entered into the L2 list for the y-axis. I was now able to create a graph to show the data. The print screens of the GDC are shown below:

The images taken from the GDC clearly shows a distinctive relationship between population and time. The image on the left shows the data entered into the GDC in a table format and the graph on the right shows the data graphically. The graph displays a positive correlation suggesting that the population increases as time progresses. I have calculated the change in population over the time interval of every 10 years to show how much the population increases with time.

Change in Population

1801-1811:10,164,256 – 8,892,536 = 1,271,720
1811-1821:12,000,236 – 10,164,256 = 1,835,980
1821-1831:13,896,797 – 12,000,236 = 1,896,561
1831-1841:15,914,148 – 13,896,797 = 2,017,351
1841-1851:17,927,609 – 15,914,148 = 2,013,461
1851-1861:20,066,224 – 17,927,609 = 2,138,615
1861-1871:22,712,266 – 20,066,224 = 2,646,042
1871-1881:25,974,439 – 22,712,266 = 3,262,173
1881-1891:29,002,525 – 25,974,439 = 3,028,086
1891-1901:32,527,843 – 29,002,525 = 3,525,318
1901-1911:36,070,492 – 32,527,843 = 3,542,649
1911-1921:37,866,699 – 36,070,492 = 1,796,207
1921-1931:39,952,377 – 37,866,699 = 2,085,678
1931-1951:43,757,888 – 39,952,377 = 3,805,511

The graph on the GDC is not very detailed and gives a rough idea therefore I have constructed a more defined graph using the software ‘Graphical Analysis 3’ which allows us to study the data in more depth.

After analysing the change in population data and the graph, it is evident that there is steady growth of population during 1801 – 1951. The rate of change of population over every 10 years increases during the years of 1801 – 1911 which is supported by the data of change of population. This is also represented by the increase in gradient of the growth line up to 1911 which shows that there is exponential growth. This suggests that the greater the population, the more people there are to produce offspring therefore population growth is greater when there is a larger population. Population growth has probably occurred due to the increase in standard of life. As the country develops, there is an improvement in the economy over time. This in turn improves the availability and the quality of food, medicine and services which reduce death rates and increase birth rates. However after 1911, the growth shown on the graph slows down as the gradient decreases....