Dave calculated the number of gallons used and the distance traveled in his car using the equation y = 30x, where x is the number of gallons used and y is the distance traveled.

Which person would have traveled farther after using 9 gallons of gas?
A. Andrew would have traveled farther.
B. Dave would have traveled farther.
C. They both would have traveled the same distance.
D. There is not enough information to tell who traveled farther.​