Line Graphs show continuous data. Examples include the world population, the value of the dollar, average daily temperatures, a patient's temperatures, and distances travelled on a journey.
Of the two variables in bar graphs, the independent variable is the one on which the other variable depends. The independent variable goes on the horizontal axis and a common example is the months of the year.
The dependent variable is written on the vertical axis and a common example includes the frequency.
Some important tips are:
Moore's Law of Computing Power states that the number of components in integrated circuits (associated with processing speed, memory capacity, and the number of pixels in cameras) doubles every 2 years.
|2010||1 000 gigabytes|
|2012||2 000 gigabytes|
|2014||4 000 gigabytes|
|2016||8 000 gigabytes|
|2018||16 000 gigabytes|
|2020||32 000 gigabytes|
The world population in 2011 passed the 7 billion mark. That's you, me and 6 999 999 998 other humans - all breathing the same air and needing the same nutrients on our planet with its finite resources.
Draw a line graph of the world population using the estimated data in the table above. Extend that table till the year that you believe you will be a grandparent. How many others will be on Planet Earth then?