DA0-002 Visualization and Reporting Practice Question
A business analyst needs to show the monthly sales trend for the past three years. Which chart type is most appropriate?
⚠ Common exam trap
DA0-002 often tests chart selection by intent, so the trap is choosing a histogram because it sounds statistical, when the question explicitly asks for a trend over time, which requires a line chart.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Line chart
A line chart is the standard visualization for showing a continuous trend over time, with time on the x-axis and the measured value on the y-axis. Monthly sales across three years is a time series, so a line chart clearly reveals trends, seasonality, and growth patterns. It is the most appropriate choice for this analytical goal.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Histogram
Why it's wrong here
A histogram bins continuous numeric values to show their frequency distribution, so it cannot plot sales values against successive months. It is tempting because it displays quantitative data visually, but it is the correct choice when showing how one continuous variable's observations are distributed across ranges.
- ✗
Pie chart
Why it's wrong here
A pie chart encodes data as proportional slices of a circle, comparing parts to a whole at a single point in time, but it cannot display a continuous trend across monthly intervals over three years. The requirement demands a time-series visualisation where the x-axis represents sequential months and the y-axis shows sales values. This option is tempting because pie charts effectively show category proportions, such as each month’s share of total annual sales, but that static snapshot does not reveal upward or downward movement over time.
- ✓
Line chart
Why this is correct
A line chart plots continuous time-series data along a chronological axis, making month-to-month movement across three years immediately visible. Its connected points reveal trend direction and seasonality, which categorical charts such as bar or pie cannot express as clearly for this continuous temporal requirement.
- ✗
Scatter plot
Why it's wrong here
A scatter plot positions points by two numeric variables to reveal correlation between them, not a value tracked across sequential time periods. It is tempting because it plots quantitative data on two axes, but it is the correct choice when testing whether two continuous variables are related.
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Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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