With reference to visual communication, explain the following:
Bar graphs are used to display data in a similar way to line graphs, However, rather than using a point on a plane to define a value, a bar graph uses a horizontal or vertical rectangular bar that levels off at the appropriate level.
There are many characteristics of bar graphs that make them useful. Some of these are that:
- They make comparisons between different variables very easy to see.
- They clearly show trends in data, meaning that they show how one variable is affected as the other rises or falls.
- Given one variable, the value of the other can be easily determined.