WEST–B Mathematics Practice Test

A histogram is indeed a graphical representation of the distribution of numerical data using bars. In a histogram, the data is divided into intervals, or "bins," and the height of each bar represents the frequency of data points that fall within each bin. This visual format allows for an easy understanding of the distribution of the data, such as identifying trends, patterns, or the shape of the data distribution (e.g., normal distribution or skewness).

Unlike a pie chart, which displays parts of a whole in a circular format, a histogram specifically focuses on showing how data values are distributed across different ranges. It is also distinct from a table showing frequency distribution, as it presents the same information in a more visually engaging and digestible format, making it easier for the viewer to analyze the overall trends in the data set at a glance. Thus, option B accurately defines a histogram and its purpose in data analysis.