Types of graphs and charts include line graphs, bar graphs, and circle charts. Different types of graphs and charts display data in different ways, and some are better suited than others for different uses. To interpret a graph or chart, read the title, look at the key, read the labels. Then study the graph to understand what it shows. You see them everywhere: pie charts, bar graphs, and grid charts that represent mathematical information. How do you learn to read them? Practice! In this lesson you will: Read bar graphs, pie charts, and grid charts; Review percentages in pie charts; Compare types of information shown in different kinds of charts Technically, graphs are one kind of chart. (Other kinds of charts include diagrams and tables. Charts include any way to visually summarize and compare data.) The rest of this page will show examples of different kinds of charts and graphs. It will explain them and show the most important vocabulary you will need to discuss them yourself.