This PL-300 practice question tests your understanding of visualize and analyze the data. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A Power BI report includes a bar chart showing total sales by product category. The report designer wants to add a trend line to the chart to show the overall sales trend over time. Which type of visual should be used instead?
Stacked bar chart
Why wrong: A stacked bar chart is not ideal for trend lines; it is better for comparing parts of a whole.
Line chart
A line chart is the standard visual for showing trends over time, and it supports adding a trend line.
Scatter chart
Why wrong: Scatter charts are used for correlation between two numerical variables, not for time trends.
Pie chart
Why wrong: Pie charts show proportions and cannot display trends over time.
Answer choices
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 correct visual to show a trend over time because it plots data points connected by straight lines, making it easy to see the overall direction and pattern of total sales across a continuous time axis. Bar charts, including stacked variants, are designed for comparing discrete categories, not for displaying continuous trends.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Stacked bar chart
Why it's wrong here
A stacked bar chart is not ideal for trend lines; it is better for comparing parts of a whole.
Line chart
Why this is correct
A line chart is the standard visual for showing trends over time, and it supports adding a trend line.
Related concept
Read the scenario before looking for a memorised answer.
Scatter chart
Why it's wrong here
Scatter charts are used for correlation between two numerical variables, not for time trends.
Pie chart
Why it's wrong here
Pie charts show proportions and cannot display trends over time.
Common exam traps
The trap here is that candidates may think a bar chart with a trend line added via the analytics pane is acceptable, but the question asks which visual should be used instead, implying the bar chart is not the optimal choice for showing a trend over time.
Trap categories for this question
Command / output trap
Pie charts show proportions and cannot display trends over time.
Detailed technical explanation
In Power BI, line charts use a continuous axis (typically date or time) and can include multiple series, but for a single trend line, the chart automatically aggregates the measure (e.g., SUM of sales) at each time point. The trend line feature in a bar chart is a separate analytical overlay, but the native line chart is the standard visual for time-series data because it inherently supports a continuous x-axis and smooth interpolation between points.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
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FAQ
Visualize and analyze the data — This question tests Visualize and analyze the data — Read the scenario before looking for a memorised answer..
The correct answer is: Line chart — A line chart is the correct visual to show a trend over time because it plots data points connected by straight lines, making it easy to see the overall direction and pattern of total sales across a continuous time axis. Bar charts, including stacked variants, are designed for comparing discrete categories, not for displaying continuous trends.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This PL-300 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PL-300 exam.
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