When the new supply exceeds demand, the surplus is added to the stock buildup. The differences between the new supply and demand of each month are represented by the shaded areas. The Y-axis is on the right side of the graph and a zero and break marks have been placed on it. The tick marks on both the horizontal and vertical axes are outside the graph frame. Line patterns differentiate the data lines.
Line labels identify the data lines.
The opposite approach, removing the line labels and using a legend, is also acceptable. The data source citation is indented and in the lower-left corner below the graph. Sometimes more data than can be clearly presented are displayed in a line graph and the presentation becomes cluttered. This section illustrates methods to eliminate overlap in line graphs. The above figure is an example of a convenient method to summarize a large amount of data.