A bar diagram is a graph that represents data with rectangular bars. The length or height of the bar is proportional to the value it represents. Bar diagrams are used to compare data across categories.



A base line is a horizontal or vertical line that serves as a reference point for measurements or calculations. In a bar diagram, the base line represents the zero value or starting point for the bars.



The orientation of the base line in a bar diagram depends on the type of data being represented.

- For vertical bar diagrams, the base line is a horizontal line that runs along the bottom of the graph.
- For horizontal bar diagrams, the base line is a vertical line that runs along the side of the graph.



The base line is an important reference point in a bar diagram because it helps to:

- Ensure accurate representation of data: The base line ensures that the bars accurately represent the values they are meant to represent.
- Facilitate comparisons: By starting all the bars at the same point, the base line makes it easy to compare the lengths or heights of the bars.



A false base line is a line that is used as a reference point in a bar diagram, but does not represent the zero value or starting point for the data being represented. This can be misleading and result in inaccurate interpretations of the data.

It is important to always use a true base line in a bar diagram to ensure accurate and meaningful representation of the data.

Horizontal