Bar graph or bar chart is used to represent data(which is in form of categories) in a graphical or pictorial manner. This helps in easy understanding of big numerical figures and can help in comparing the data more efficiently. Bar graph is widely used to compare sizes of different categories relatively. Bars in bar graph are always equally spaced. Bar graphs are used where data is present in form of categories like types of fruits, different students, etc. But where continuous data is given <em>histograms</em> should be used. For example - If a survey of population among different years is to be represented , it can easily be shown by Bar graph. As a graph has 2 axis bar graph also contains 2 axis i.e. X axis and Y axis.
There are 2 types of bar graphs as following :
Horizontal bar graph - In this graph, bars are horizontal and size of x axis values are compared where y axis values contains categories.
Vertical bar graph - In this graph, bars are vertical and bars represent size of x axis values which are categories and y axis values determine length of the bar.
The Geosynchronous Satellite is mainly used for sending data and information to the spacecraft from one of the centers on Earth. It is also used for communication between the center on Earth and the spacecraft.
