In the equation \( g = 14 - 0.5h \):
- \( g \) represents the number of gallons of gas left in the tank.
- \( h \) represents time in hours.
- The term \( -0.5h \) indicates that for each hour \( h \), the car consumes 0.5 gallons of gas.
The number 14 in this equation represents the initial amount of gas in the tank at the start of the trip. Therefore, when \( h = 0 \), the number of gallons \( g = 14 \).
Given the options, the correct answer is:
The number of gallons of gas at time \( h = 0 \).