21. Fill in the blank: Pre-aggregation involves _____ while data is in the database, before it is transferred to the visualization tool.
- making calculations
- reporting
- analyzing
- setting permissions
22. A business intelligence professional creates a data visualization that uses only color to specify the data points. What should they do to make the visualization more accessible?
- Include labels.
- Remove outliers.
- Combine data from multiple sources.
- Add more data points.