How much fuel will this vehicle use before the trip starts?
Specifications such as weight and horsepower are useful, but drivers need an answer in miles per gallon, gallons, and dollars.
ONE SIMPLE FORM / THREE IMMEDIATE RESULTS
9 November 2026
The trip-cost question
A model that responds to the driver
Neon Drive Planner sends four vehicle inputs to a regression model. The server then combines predicted fuel economy with distance and fuel price.
round(summary(vehicle_model)$r.squared, 3)
## [1] 0.849
The evaluated result above shows how much variation in the training data the model explains.
The data supports the interaction
Weight, horsepower, cylinders, and transmission give the app enough structure for a useful educational estimate.
A complete and reviewable product
The app includes reactive inputs, server-side prediction, live trip calculations, an explanatory chart, and novice instructions on the site itself.
OPEN THE APP / ADJUST THE VEHICLE / READ THE COST
Source code includes separate ui.R and server.R files for straightforward peer review.