AP Lang — charts, graphs and images as sources in the synthesis essay

Every synthesis prompt on the AP English Language and Composition Exam includes visual sources, and at least one of them is quantitative: a bar chart, a line graph, a table or a scatter plot. Students often skip these sources or quote them loosely, which wastes some of the most concrete evidence the prompt offers. This material trains you to read a chart quickly and accurately, to know what it can and cannot support, and to bring it into your essay with a clear citation.

The quiz has twelve questions on invented sources. Nine of them come with a drawn chart, and every question also states the data in words, so nothing depends on reading the picture alone. A bar chart of weekday bus ridership from 2019 to 2025 is the basis for four questions: which claim the data support, a percent-change calculation, the limits of the evidence when a student calls the system "more popular than ever," and which sentence integrates and cites the chart well. A grouped bar chart comparing reading rates by age group in 2015 and 2025 supports three more: reading the comparison correctly, judging an overstated claim that young adults have "abandoned reading," and recognizing a question the chart simply cannot answer. A scatter plot of library opening hours and library-card ownership across nine counties raises the difference between association and causation and asks what further evidence would support a causal claim. The last three questions turn to other issues that come up with visual sources: how to use a photograph, how to weigh a chart produced by an interested company, and how a vertical axis that starts above zero exaggerates a change.

Explanations show every computation and name the misreading behind each wrong answer.

The flashcards collect the working rules: how many sources the synthesis essay uses and how visual sources appear in it, how to cite a chart, percent change versus percentage points, association versus causation, truncated axes, the limits of a chart, and the publisher's interest.

The material offers a multiple-choice quiz and flashcards. It is independent practice based on the published course framework and exam description and is not produced or endorsed by the College Board.

• Read bar charts and scatter plots accurately and compare values
• Compute a percent change and distinguish it from a change in percentage points
• Decide which claims a chart supports, and which overstate it
• Distinguish association from causation and identify evidence that would support a causal claim
• Integrate and cite a visual source in a synthesis essay, taking its publisher and design into account

Practice material written by Zestly, based on the College Board's AP English Language and Composition Course and Exam Description (free-response question 1: synthesis, six sources including two visual sources, at least one quantitative; skill categories 3 and 4) and the exam overview on AP Central. All sources and data are invented.