What type of graph would Walmart use to show the distribution of employee numbers over the years?

The histogram is the most appropriate choice for displaying the distribution of employee numbers over the years because it is specifically designed to visualize the frequency distribution of numerical data within specified intervals. In this context, each bar of the histogram represents a range of employee numbers for specific years, allowing for a clear depiction of how many years fall into each range of employee numbers.

Using a histogram enables Walmart to effectively convey how their employee numbers have varied over time, highlighting trends, gaps, or concentrations within particular ranges. It emphasizes the underlying distribution rather than just individual data points or trends over time, which aligns well with the goal of assessing the distribution pattern.

On the other hand, a scatter plot would show individual data points and is better suited for examining the relationship between two variables rather than displaying a distribution. A line graph connects points over a time series, which is useful for showing trends, but it does not provide insight into how values are distributed across different intervals. Finally, a bar graph might be used to represent employee numbers in different years but does not effectively illustrate how these numbers are distributed or clustered within those years, which is the key focus of the question.