Answer :
A bubble diagram is used when we want to represent three variables on a two-dimensional plot, incorporating the size or color of bubbles to visualize the magnitude of a third variable.
A bubble diagram is typically used when we want to represent three variables on a two-dimensional plot. In addition to the x and y coordinates, a third variable is represented by the size or color of the bubbles.
A bubble diagram is particularly useful when we want to visualize the relationship between two variables while also displaying the magnitude of a third variable. This is different from a scatter diagram, which only represents two variables.
For example, suppose we want to analyze the relationship between the age and income of individuals from different cities. A scatter diagram can be used to plot age on the x-axis and income on the y-axis. However, if we also want to show the population size of each city, we can use a bubble diagram. The x-axis represents age, the y-axis represents income, and the size or color of the bubbles represents the population size of each city.
In summary, a bubble diagram is used when we need to represent three variables simultaneously, incorporating the x and y coordinates as well as the size or color of the bubbles to visualize the magnitude of a third variable.
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