Which graphical display is suitable for representing zip codes?

A bar chart is suitable for representing zip codes because it effectively displays categorical data, which is what zip codes are. Zip codes classify different geographical regions for mail delivery, and each zip code represents a distinct category. In a bar chart, each zip code can be represented as a separate bar, allowing for easy comparison of the frequency or number of occurrences associated with each zip code.

The height of each bar can show how many times that zip code appears in the dataset, allowing for visual analysis of the distribution of data across different areas. This type of graphical visualization is particularly effective for categorical variables as it emphasizes the differences between the categories.

Other options like histograms and box plots are more suited for quantitative data rather than categorical data. While pie charts also display categorical data, they are less effective for showing variations in counts when there are many categories, as might be the case with zip codes. A bar chart provides a clearer representation for comparison and is generally more intuitive for conveying counts of distinct categories like zip codes.