CompTIA Data+ (DA0-002)VisualizationMedium
A data analyst is creating an interactive dashboard to monitor customer churn. The dashboard needs to show the churn rate over the last 12 months, segmented by customer tenure groups (e.g., <1 year, 1-3 years, >3 years). Users should be able to quickly see the trend for each tenure group and how their churn rates compare against each other. Which chart type is MOST suitable for this requirement?
- AGrouped Bar Chart
- BScatter Plot
- CMulti-Line Chart
- DPie Chart
Show answer & explanationAnswer & explanation
Correct answer: C. Multi-Line Chart
A multi-line chart (or line chart with multiple series) is ideal for showing trends of multiple categories over time. Each line would represent a customer tenure group, allowing for easy comparison of their individual churn rate trends over the 12-month period.
Why the other options are wrong
- A. Grouped bar charts are good for comparing discrete categories at specific points, but less effective for showing continuous trends over 12 months for multiple groups simultaneously.
- B. Scatter plots are used for showing relationships between two numerical variables, not for comparing multiple time-series trends.
- D. Pie charts show parts of a whole at a single point in time, not trends over 12 months or comparisons of multiple trends.
Multi-Line Chart
A line chart that displays multiple distinct data series, each represented by its own line, on the same set of axes, typically used for comparing trends over time.
- Compares trends of multiple categories over time.
- Each category has its own line.
- Effective for identifying divergences or convergences in trends.
- Requires a continuous variable (time) on the x-axis.
Memory trick: Many Lines, Many Trends, Easy to See What's Sending!