Gene has a gasoline budget of $250 per month. He uses an average of $6 of gasoline each day he drives. Which of the following equations represents how much money is left in his gasoline budget after x days of driving?
A.
y = 250x - 6
B.
y = 250 - 6x
C.
y = 250 + 6x
D.
y = 6x - 250
