Mode being a positional average so it can be located graphically by the following process.

• A histogram of the frequency distribution is drawn.
• In histogram, the highest rectangle represents the model class.
• The top left corner of the highest rectangle is joined with the top left corner of the following rectangle and top right corner of the highest rectangle is joined with the top right corner of the preceding rectangle respectively.
• From the point of intersection of both the lines a perpendicular drawn on X-axis, check that point on X-axis. This will be the required value of mode.