Which type of graph shows parts of a whole?

The pie chart is designed specifically to illustrate how different parts contribute to a whole. Each slice of the pie represents a category’s share in relation to the total, providing a clear visual representation of proportion. This is particularly useful when the goal is to compare various segments and understand their contributions without the distraction of additional data points.

In contrast, line graphs primarily show trends over time, highlighting changes and relationships between variables rather than parts of a whole. Bar graphs are effective for comparing quantities of different categories but do not inherently depict the relationship of these categories to a total. Histograms are used to display the distribution of numerical data by grouping values into ranges; they focus on frequency rather than depicting parts of a whole. The pie chart distinctly stands out as the most effective tool for visualizing proportional relationships.