To find the unit rate of miles per gallon for each vehicle, we can use the formula:
\[ \text{Miles per Gallon} = \frac{\text{Miles Traveled}}{\text{Gasoline Used (gal)}} \]
Now let's calculate the miles per gallon for each vehicle:
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Sedan: \[ \text{Miles per Gallon} = \frac{630 \text{ miles}}{35 \text{ gallons}} = 18 \text{ miles per gallon} \]
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Minivan: \[ \text{Miles per Gallon} = \frac{798 \text{ miles}}{42 \text{ gallons}} = 19 \text{ miles per gallon} \]
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Truck: \[ \text{Miles per Gallon} = \frac{864 \text{ miles}}{54 \text{ gallons}} = 16 \text{ miles per gallon} \]
So, the unit rates are:
- Sedan: 18 miles per gallon
- Minivan: 19 miles per gallon
- Truck: 16 miles per gallon