Which option is used to display the regression equation on a graph?

The correct answer is associated with the use of the REGEQN option, which is explicitly meant for displaying the regression equation on a graph when using PROC SGPLOT or similar procedures in SAS. When you include this option in your plotting statement, it instructs SAS to calculate and then overlay the regression equation directly onto the graph, enhancing the interpretability of the plotted data by providing viewers with a mathematical representation of the relationship between the variables.

This is particularly useful in regression analysis, where visual representation of the model can help to convey insights effectively. By enabling the regression equation display, it allows analysts and stakeholders to not only view the data points but also understand the predicted relationship defined by the regression analysis.

Other options suggest variations or alternative approaches that do not specifically target the display of the regression equation. While it’s essential to understand the context and purpose of each, the REGEQN option is explicitly designed for the purpose of showing the regression equation, making it the clear choice for displaying this information in graphical outputs.