To calculate the unit rate of miles per gallon (mpg) for each vehicle, you'll need the distance traveled by the vehicle and the amount of fuel consumed (in gallons). The unit rate is calculated using the formula:
\[ \text{Miles per gallon (mpg)} = \frac{\text{Distance (miles)}}{\text{Fuel consumed (gallons)}} \]
If you provide the specific distances and fuel consumptions for the sedan, minivan, and truck, I can help you calculate their respective miles per gallon.