This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Data Variables, Subject name: Social & Preventive Medicine
Trends can be represented by - 
Select and explain. 
A. Line diagram, B. Bar diagram, C. Scatter diagram, D. None
A: Line diagram
Answer: A: Line diagram 
Explanation: Ans. is 'a' i.e., Line diagramLine diagram 1 Line chart/Line graph)o It is used to show the trend of events with passage of time and shows how the frequency of a particular event or variable vary over time. DataMethodFrequency of occurrence (comparisons of magnitude)Bar ChartPie chartTrends over timeLine graphDistribution (not related to time)Histogram,Frequency polygonAssociation (Looking for correlation between two variables)Scatter diagram