True or False: When a value in a slicer is selected, the DAX context for connected visualizations changes.

When a value in a slicer is selected, it filters the data for connected visualizations based on the chosen criterion. This selection changes the DAX context because it alters the set of data that the DAX formulas will evaluate.

In Power BI, slicers are used to create a dynamic filtering experience, allowing users to control what data they want to see in visualizations. When a slicer is applied, it enriches the DAX context by narrowing down the data set, which consequently impacts calculations and aggregations performed in the connected visualizations. This is essential for interactive reporting, as it enables the visuals to reflect only the relevant data that corresponds to the slicer selection, providing an accurate representation of the data according to the user's input.

Thus, stating that when a value in a slicer is selected, the DAX context for connected visualizations changes is true, because the context depends on the filtered data that results from the slicer choice.