Public Transportation Use in Metro Areas of North America
graph by Arturo Ramos; slow reveal by Jenna Laib
Type of Graph: scatterplot
Purpose
This slow reveal is designed to support analysis and discussion of both the data and the design choices. The questions in the slide deck invite learners to examine trends, relationships, and possible interpretations. This graph invites students to the estimate and compare values, understand a logarithmic scale, make sense of percentages, and consider trends.
About This Graph
This visualization is not provided for reuse or redistribution. Readers and educators are encouraged to view the original visualization in its published context.
Original Visualization:
Ramos, Arturo. “Public Transport in Major North American Metro Areas.” WikiMedia: July 23, 2008.
Accessed at: https://commons.wikimedia.org/wiki/File:NorthAmericanPublicTransport.png
Data Sources:
Wikipedia. “List of the Americas rail transit systems by ridership.” Wikipedia: last accessed April 10, 2026.
Accessed at: https://en.wikipedia.org/wiki/List_of_the_Americas_rail_transit_systems_by_ridership
In The Classroom
There are many different mathematical connections that can be made to this data and data visualization.
Potential Math Content: scatterplot, logarithmic scale, percentages, comparing values, multiplicative comparisons
Potential Content Connections: transportation, public transit, US, Canada, Mexico
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