According to economists, this episode of great recession was resulted from a sudden busting of house bubble in US, where the house bubble was caused by rapid growth of improper regulation on sub-prime mortgages (Merriam 2009; Wang 2009; Whitney 2007).
When working with equations that have two variables, the coordinate plane is an important tool. It's a way to draw pictures of equations that makes them easier to understand. To create a coordinate plane, start with a sheet of graph or grid paper. Next, draw a horizontal line.
The projected or planar coordinate system locates points relative to the point of origin (0,0) and the x-and y-axes. Points below the x-axis or to the left of the y-axis have negative values. A projected coordinate system inherits the components of a geographic coordinate system and also has: Projection: The mathematical transformation used to convert from geographic coordinates to planar (projected) coordinates. Parameters: Parameters used in the transformation.