To calculate the unit rate of miles per gallon for each vehicle, we can take the average of the given miles per gallon values for each vehicle.
Sedan Calculation:
Miles per gallon values: 20, 19, 15, 18
\[ \text{Average MPG} = \frac{20 + 19 + 15 + 18}{4} = \frac{72}{4} = 18 \]
Sedan: 18 miles per gallon
Minivan Calculation:
Miles per gallon values: 22, 19, 15, 23
\[ \text{Average MPG} = \frac{22 + 19 + 15 + 23}{4} = \frac{79}{4} = 19.75 \]
Minivan: 19.75 miles per gallon
Truck Calculation:
Miles per gallon values: 15, 16, 17, 14
\[ \text{Average MPG} = \frac{15 + 16 + 17 + 14}{4} = \frac{62}{4} = 15.5 \]
Truck: 15.5 miles per gallon
Summary of Unit Rates:
- Sedan: 18 miles per gallon
- Minivan: 19.75 miles per gallon
- Truck: 15.5 miles per gallon