A scatter diagram is a graphical tool used to display the relationship between two variables. It is also commonly known as a scatter plot, scattergraph, or a scatter chart. Scatter diagrams are ideal for visualizing the correlation or association between the two variables. Some other synonyms that can be used for scatter diagram include scattergrams, scatterplots, dot plots, bubble charts, or XY graphs. These may vary in their appearance and usage, but they all essentially represent the same idea - a graph that shows the relationship between two variables. Scatter diagrams are useful in a variety of fields such as business, economics, medicine, and social science.