Types of Graphs. 1  Types of Graphs: Bar Graphs. 2  Types of Graphs: Box and Whiskers (Boxplots) 3  Types of Graphs: Frequency Distributions.  Types of Graphs: 1  Histogram. Types of Graphs: Line Graphs.  Types of Graphs: Pie 1  Graphs. Types of Graphs: Scatter Graphs.  Types of Graphs: Stemplots.
The 1950s. By the end of the war, TVA had completed a 652-mile navigation channel the length of the Tennessee River, and had become the nationâs largest electricity supplier.
Tennessee Valley Authority Tennessee Valley Authority The Tennessee Valley Authority (TVA) was created as a federal corporation in May 1933 in order to develop the Tennessee River and its tributaries for the purpose of navigation, flood control, and the production and distribution of electricity.