Final answer:
The number of miles Boubacar would drive on 22 gallons is calculated by multiplying the miles per gallon rate (18.18) by 22, resulting in 399.96 miles.
Step-by-step explanation:
The subject question concerns the calculation of miles driven based on the number of gallons used by employing a direct variation relationship. From the given data, we can find the miles per gallon efficiency by dividing the number of miles driven by the number of gallons used. Since the student has provided incomplete data, we will use the example that mentions a vehicle driving 400 miles using 22 gallons. Thus, we calculate the rate as 400 miles / 22 gallons = 18.18 miles per gallon.
To find out how many miles Boubacar would drive on 22 gallons, we multiply the miles per gallon rate (18.18) by the number of gallons (22): 18.18 miles/gallon × 22 gallons = 399.96 miles.