October 27, 2026

About this presentation

  • Created on October 27, 2026 with R Markdown (ioslides) and Plotly.
  • Data: the built-in mtcars dataset, 32 cars from 1974.
  • Question: how do weight, power and transmission relate to fuel economy?
  • Every chart is interactive: hover for details, click legend items to hide groups, drag to zoom, double-click to reset.

Heavier cars burn more fuel

Power, weight and efficiency in 3D

MPG by transmission

Takeaways

  • Manual cars average 24.4 MPG vs 17.1 MPG for automatics.
  • Much of that gap comes from weight: heavier cars get fewer miles per gallon.
  • Each extra 1000 lbs costs about 5.3 MPG.
  • Source code is in this R Markdown file, so the presentation is fully reproducible.