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.
As one of the largest transmission systems in North America, TVAâs 17,000 miles of lineâenough to span the United States six times overâprovide the critical link that connects power from our generating plants through a network of 154 local power providers to 9 million people in the Tennessee Valley across 80,000 square miles in seven states.