What is the primary purpose of a graph?

The primary purpose of a graph is to visually represent data to illustrate the relationship between two or more variables, making it easier for the viewer to understand and analyze trends, patterns, and correlations within the data. Graphs serve as effective tools for data visualization, enabling quick insights that may be less apparent in raw data formats.

In contrast, a table displaying numerical data organizes figures in rows and columns but does not inherently illustrate relationships or trends visually, making it less effective for this specific purpose. Similarly, a list of items organized by category presents information in a straightforward manner, but it lacks the visual dynamics needed to convey relationships between data points. A descriptive paragraph provides context and explanation about a subject but does not utilize visual elements that demonstrate relationships or trends, which is a fundamental characteristic of graphs. Thus, the correct answer highlights the primary function of a graph in conveying complex information in an accessible format.