Which chart combines both absolute and relative values?

The combination chart, also known as a combo chart, effectively visualizes data in a way that represents both absolute and relative values. This is particularly useful when you want to illustrate different data sets that may have different scales or units but are nonetheless related. For instance, in a combo chart, you might display sales revenue using bars as absolute values while overlaying sales growth percentage as a line, showcasing relative changes over time.

This dual representation allows users to quickly grasp trends and compare performance on both a numerical and percentage basis within the same visual. It enhances the data interpretation by providing a comprehensive view, making it clear how absolute numbers and relative proportions relate to one another.

In contrast, other chart types such as bar, line, and pie charts typically focus on either absolute values or relative proportions but do not blend both within a single chart. A bar chart typically displays only absolute values, while a line chart is primarily concerned with trends over a period, and a pie chart represents parts of a whole without displaying trends or other absolute values. Thus, the combo chart stands out as the optimal choice for combining both types of data representation.