The most recognizable graph type is the pie graph. A pie graph is a graphic form used to impart information about percentages. The various "parts" of the pie chart portray component parts of an aggregate or total This pie graph displays (compares) the color distribution found in a bag of M&M's. When using a pie graph, it is advisable to limit the number of categories (e.g., colors found in a bag of M&M's) to perhaps five or six; otherwise, it may be confusing to differentiate the relative values portrayed on the graph.