Which type of graph would you use to display parts of a whole?

A pie chart is the appropriate choice for displaying parts of a whole because it visually represents data in a circular format, where each slice indicates the proportion of each category relative to the total. This makes it easy for viewers to understand how individual segments contribute to the overall dataset. Each section of the pie chart embodies a specific percentage of the total, allowing for quick comparisons among the different parts.

In contrast, a Gantt chart is primarily used for project scheduling and timelines, illustrating the start and finish dates of various elements of a project rather than relationships of parts to a whole. A flowchart serves to depict processes and the sequence of steps in a system, focusing on the flow of operations rather than parts of a data set. A bar graph represents data with rectangular bars, useful for comparing different categories but not specifically designed to show how those categories combine to form a complete unit.