What does “dual-axis” allow users to do in Tableau?

Using a dual-axis in Tableau allows users to overlay two different measures on the same graph, enabling a direct comparison of their values. This feature facilitates a clearer understanding of correlations between two related metrics that may have different scales. For instance, a user could plot revenue on one axis and profit on another, allowing for an immediate visual representation of how changes in revenue impact profit.

This capability enhances analysis by allowing viewers to interpret trends and relationships more efficiently without needing to switch between multiple views or charts. It is particularly useful when dealing with data sets where measures are closely related but vary significantly in size or range.

The other options do not accurately capture the essence of what dual-axis functionality offers. Merging data sources relates more to data blending rather than axis manipulation, while analyzing the same measure in different formats pertains to the use of marks and styles rather than dual axes. Filtering multiple axes simultaneously does not specifically relate to dual-axis capabilities but rather to filtering mechanisms within Tableau, which apply across all elements in a worksheet.