pdf Analyzing A Double Line Graph

This worksheet engages students in analyzing a double line graph that compares average ACT math scores for males and females over a 13-year span. Students interpret trends, compare rates of change, calculate differences, and determine mean differences between two data sets. The context of standardized testing adds relevance while requiring careful reading of graphical data.

Students answer questions about which gender scored higher, identify years when scores were closest, determine the largest increases between consecutive years, and compute the mean of 13 yearly differences rounded to the nearest hundredth. One question also prompts students to analyze how the y-axis scale affects visual interpretation, helping them recognize how graph design can exaggerate or minimize differences.

Because this activity blends graph interpretation with computation and critical thinking, it strengthens both data analysis skills and mathematical reasoning. It works well as class discussion material, independent practice, or assessment within a statistics and data analysis unit.

Skills Assessed

• Interpreting double line graphs

• Comparing two related data sets

• Calculating differences and mean values

• Analyzing rate of change over time

• Evaluating how graph scales influence perception

• Drawing conclusions from statistical data

Details

• 2 pages

• Answer key included

ID# 0716