A Look At Area Graphs - Visualoop
▻http://visualoop.com/blog/30496/a-look-at-area-graphs
The chart we’ll be looking at in this post is Area Graphs, a graph which is essentially a Line Graph with the area below the line filled in.
A Simple Area Graph is drawn by plotting data points on a cartesian coordinate grid, then joining a line between the points and finally filling in the space below the completed line. This give Area Graphs their iconic rocky mountain-like appearance. Area Graphs are ideal for showing trends, by showing the development of quantitive values over intervals or time periods.
History
The first appearance of a Area Graph or Line Graph was a chart on the national debt of England in the 1786 book The Commercial and Political Atlas, by William Playfair, a Scottish engineer and political economist.
