CompTIA Data+ (DA0-002)VisualizationEasy
A data analyst is designing a financial dashboard for investment managers. The dashboard must clearly show the performance of several investment portfolios over the past five years, with each portfolio's performance displayed as a continuous trend. Additionally, the managers need to quickly identify periods of significant volatility or divergence among the portfolios. Which chart type is MOST effective for this scenario?
- AScatter Plot
- BMulti-Line Chart
- CPie Chart
- DBar Chart
Show answer & explanationAnswer & explanation
Correct answer: B. Multi-Line Chart
A multi-line chart is ideal for showing the continuous trend of multiple series (investment portfolios) over a common time axis. It allows for easy comparison of performance trajectories and quick identification of divergence or volatility.
Why the other options are wrong
- A. Scatter plots show relationships between two numerical variables and are not primarily designed for time-series trend comparison of multiple series.
- C. Pie charts show parts of a whole, which is not suitable for displaying performance trends over time.
- D. Bar charts are better for comparing discrete categories or values at specific points in time, not continuous trends.
Multi-Line Chart
A line chart that displays multiple distinct lines, each representing a different data series, against a common X-axis (typically time) and Y-axis (quantitative value).
- Excellent for comparing trends of several categories over time.
- Clearly shows divergence, convergence, and volatility.
- Can become cluttered if too many lines are displayed.
Memory trick: Many lines charting many paths through time.