Which type of report cannot be used to populate a chart in a dashboard?

A tabular report cannot be used to populate a chart in a dashboard because it provides data in a simple, list-like format without aggregating values. While tabular reports are useful for displaying detailed records, they do not offer the summarized data necessary for visual representation in a chart.

In contrast, summary reports group related information and provide totals, making them suitable for charts as they can show trends over time or across categories. Matrix reports offer additional flexibility by allowing users to summarize information in a grid format, displaying data across both rows and columns, which also makes them appropriate for charting.

Therefore, while summary and matrix reports can effectively feed charts in a dashboard, tabular reports lack the necessary structure to present data in a way that is visually interpretable.