Final answer:
To view underlying data in Tableau, hover over visualization elements, use the 'View Data' option, or drill down for more detail. Tableau provides tools for in-depth analysis, but remember that visualizations are just one perspective and should be interpreted critically.
Step-by-step explanation:
To view the data that underlies a visualization in Tableau, you can use several features designed for this purpose. If you have already created a visualization, such as a graph, pie chart, or table, most of the time you can simply hover over elements of the visualization to see underlying data points. Additionally, Tableau provides options to view the entire data source by clicking on 'Data' at the top of the screen and then 'View Data'. This allows you to see the complete data set used for the visualization. For a deeper analysis, Tableau also offers the functionality to drill down into more detailed levels of the data by using filters or by creating detailed cross-tabs and tables for comprehensive examination.Remember that any graph or visualization is just one perspective on the data, and it's important to interpret visualizations by considering the choices made during their creation - such as the time frame, how data is grouped, the scales used and starting points on axes. This critical assessment helps in understanding the underlying relationship and can guide better decision making based on the visualization.