Cindy, Joe, and Elayna showed data about hours of sleep for different animals (giraffe, raccoon, squirrel, bear) in different graphs. The document discusses which graph best displays this type of data and provides examples of different graphs that would be best to display other types of data, such as comparing speeds of animals, election votes, heights over time, math grades, favorite subjects in classes, plant growth over time, favorite student activities, and monthly temperatures.