This document provides guidelines for writing a summary of data in a chart or graph. It includes sections for an introduction, general statement, body paragraphs, and conclusion. The introduction should name the chart/graph type and measurable quantities for the subjects and time period. The general statement outlines the main behavioral differences between the subjects. Each body paragraph provides values for one subject and time period. The conclusion states overall similarities or differences and trends in the data. Precise language is recommended to discuss values and changes over time.