Car mileage can be hard to guess.

This app estimates miles per gallon (mpg) from a car’s weight and number of cylinders.

1. Move the slider to choose the car’s weight.
2. Select 4, 6, or 8 cylinders.
3. Read the estimated mpg.

The estimate updates when you change an input.

The app uses the built-in mtcars dataset and a simple prediction model.

For example, here is the estimate for a car weighing 3,000 pounds with 4 cylinders:

model <- lm(mpg ~ wt + cyl, data = mtcars)
round(predict(model, data.frame(wt = 3, cyl = 4)), 1)

##    1 
## 24.1

• It is quick and easy to use.
• You can see how changing car details affects the estimate.
• Higher mpg means better fuel economy.

Try the app: https://ragha.shinyapps.io/carmileageapp/