Virginia Communication and Literacy Assessment (VCLA) Practice Test 2026 - Free VCLA Practice Questions and Study Guide

A bar graph is defined by the use of horizontal or vertical bars to represent data. Each bar's length corresponds to the value or frequency of the data it represents, allowing for easy comparison between different categories or groups. This visual format makes it simple to interpret and analyze the information presented, which is why the characteristic of employing bars is fundamental to the definition of a bar graph.

To clarify the other options, while some graphs may represent frequencies of intervals, that characteristic is more aligned with histograms. Using pictures to convey data is typical of pictographs rather than bar graphs. Tracking changes over time is primarily the function of line graphs, which clearly depict trends across different time intervals, a function not typically served by bar graphs.