MDM_presenting_graphs2

=__Graphical Representation __=  Graphs are used in data management to plot what happens in a certain instance or over time. It is used to demonstrate relationships between quantities and often to show distribution of variables.
 * General Information: **

**There are many ways to graph data including:** ** Pie charts ** - Pie diagram is another graphical method of the representation of data. It is drawn to depict the total value of the given attribute using a circle. ** Line graphs ** - The line graphs are usually drawn to represent the time series data related to the Temperature, rainfall, population growth, birth rates and death rates.
 * Polygraphs ** - Polygraph is a line graph in which two or more than two variables are shown on a same diagram by different lines.
 * Bar graphs ** - It is also called a columnar diagram. Bar diagrams are drawn through columns of equal width.
 * Choropleth Map ** - The choropleth maps are also drawn to depict the data characteristics as they are related to the administrative units. These maps are used to represent the d ensity of population, literacy/growth rates, sex ratio, etc.

Lurking Variables (Hidden Variables)
 * __ Graphs consists of : __**
 * Independent Variable ** — usually plotted on the horizontal axis
 * Dependent Variable** — usually plotted on the vertical axis
 * Explanatory Variable** — usually plotted on the horizontal axis
 * Response Variable** — usually plotted on the vertical axis
 * Categorical Variables** — represented by different symbols on the same coordinate system

1. One-dimensional diagrams such as line graph, polygraph, bar diagram, histogram, Age, sex, pyramid, etc.; 2. Two-dimensional diagram such as pie diagram and rectangular diagram; 3. Three-dimensional diagrams such as cube and spherical diagrams.
 * There are also different type of diagrams: **

Work Cited:

Elert, Glenn.(1998) Graphical Representations of Data. Retrieved from http://www.owl.english.purdue.edu/owl/resource/560/10