Which type of graph is most effective for displaying the percentage of salary budget spent across different employee categories?

A pie chart is the most effective choice for displaying the percentage of salary budget spent across different employee categories because it visually represents parts of a whole. Each slice of the pie corresponds to a specific employee category and its respective proportion of the total budget, allowing viewers to quickly perceive how much each category contributes to the overall salary budget. This format is particularly useful when the data is categorical and when it’s important to emphasize the relationships between different parts and the total.

Other graph types do not convey percentage distributions as effectively. For instance, a bar chart is useful for comparing different categories but would require additional calculations or labels to communicate percentage values clearly. A line graph typically represents trends over time and is not suitable for categorical data without a temporal component. Lastly, a histogram is used for displaying the distribution of numerical data and is not appropriate for displaying categorical comparisons of percentages.