circle graph	Also called a pie chart, a type of graph where categorical data is represented as sections of a whole circle.
line graph	Used to show continuous data, a graph where individual data points are connected with line segments. Line graphs are typically used for data sets that track a quantity over time.
stem-and-leaf plot	A type of graph used to visualize quantitative data. In a stem-and-leaf plot the digits of each number are organized separately to display a set of data.