Meena wants to show diagrammatically how two sets of data, namely, pop

Meena wants to show diagrammatically how two sets of data, namely, population size and number of services are related to each other. Which one of the following will be the most suitable for the presentation?

Pie chart
Scatter graph
Bar chart
Triangular graph
This question was previously asked in
UPSC CDS-1 – 2023
A scatter graph (or scatter plot) is the most suitable type of diagram for showing the relationship between two sets of numerical data. It plots data points on a two-dimensional plane, with one variable on the x-axis and the other on the y-axis. This allows visualization of the pattern or correlation between the two variables, such as how population size relates to the number of services available.
– Scatter graphs are used to display the relationship between two quantitative variables.
– Other chart types like pie charts, bar charts, and triangular graphs are suitable for different purposes (proportions, comparison of categories, ternary data respectively), but not for showing the correlation between two variable sets directly in this manner.
In a scatter graph, the dependent variable is typically plotted on the y-axis and the independent variable on the x-axis. The pattern of the scattered points indicates the nature of the relationship (e.g., positive correlation, negative correlation, no correlation).
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