What is a scatter plot used for?

A scatter plot is primarily used to illustrate the relationship between two distinct sets of data. This type of graph allows observers to discern patterns, correlations, or trends between the variables being plotted, each represented by points on the graph. The horizontal axis typically represents one variable, while the vertical axis represents another. By positioning the data points based on their values, viewers can easily identify whether an increase or decrease in one variable corresponds with an increase or decrease in the other, suggesting a potential correlation.

For example, if you are examining the relationship between hours studied and test scores, each point on the scatter plot would indicate a student's hours of study and their corresponding test score. Observing the arrangement of the points can reveal whether more study hours tend to lead to higher test scores.

The other options relate to different statistical tools or methods that are more suited for specific types of data analysis, such as cumulative data trends, comparisons over time, or summarization in tables, which are not the primary function of a scatter plot.