Which graph best represents the frequency of complaints in specific categories over time?

The Pareto Chart is most effective for representing the frequency of complaints in specific categories over time because it combines both frequency data and categorical information in a way that highlights the most significant issues. This type of chart is designed to show the relative frequency or size of problems in a descending order, often with a cumulative percentage line.

In context, when analyzing complaints, a Pareto Chart allows users to see which categories contribute most to the total number of complaints, enabling organizations to focus on addressing the most critical issues first. It visually emphasizes the "80/20 rule," which suggests that a small number of categories may account for a large proportion of the complaints, making it easier to pinpoint priorities for improvement.

While other graph types serve specific purposes, they are not as suited for this type of analysis. A scatterplot is generally used for visualizing relationships between two quantitative variables rather than categorical complaint data. A bar graph presents categorical data but does not focus on the cumulative aspect or highlight the most significant categories effectively. A line graph is commonly used to show trends over time but doesn't easily convey categorical distinctions in the way a Pareto chart does. Therefore, the uniqueness and functionality of the Pareto Chart in organizing and prioritizing complaint data over time make it the