Data Tools and Visualization Flashcards

Which visualization is best suited to show a trend over continuous time?

Answer: Line chart

A line chart connects points over time to reveal trends.

In Power BI, what does establishing a relationship between two tables enable?

Answer: Filtering and aggregating across related tables

Table relationships let filters and aggregations flow across related tables in the model.

A heatmap is most effective for what purpose?

Answer: Showing intensity across a two-dimensional matrix

A heatmap uses color intensity to show values across a 2D matrix of categories.

Which practice reduces misleading interpretation in bar charts?

Answer: Starting the value axis at zero

Starting the bar axis at zero prevents exaggerating differences between bars.

In data storytelling, what is the role of annotations on a chart?

Answer: Highlight key insights and guide the viewer's attention

Annotations call out key insights and direct the viewer's focus.

Which tool feature allows a dashboard metric to update automatically when the underlying data source refreshes?

Answer: Scheduled data refresh

Scheduled data refresh updates dashboards automatically when source data changes.

What does a dual-axis (combo) chart allow you to compare?

Answer: Two measures with different scales on the same chart

A dual-axis chart plots two measures with differing scales together for comparison.