Here are some popular types of graphs and charts: 1  Some of the basic graphs used for categorical data include pie charts and bar graphs, which break down how many responses were given for each group of certain variables, such as gender or which applications are used on teensâ cellphones. An example of a bar graph.
The Electricity Section oversees the regulation of investor-owned electric utilities in Alabama. Only one electric utility, Alabama Power Co., falls under the PSC's regulatory authority, as cooperatives and municipal systems are exempt from state regulation. Additionally, the PSC does not regulate wholesale power generators or the Tennessee Valley Authority (TVA).
The Tennessee Valley Authority (TVA) was established in 1933, during the Great Depression as one of President Franklin Delano Roosevelt's New Deal programs. The purpose of the â¦ organization was to offer general economic development (for example fertilizer manufacturing, energy generation, and flood control) to the Tennessee Valley, a particularly impacted region during the Great Depression.