Billie Sue's BBQ had their grand opening this year. The first month they did not turn a profit. However, each month thereafter, they have had steady profits of $1,600 per month. If x represents the number of months they have profited, which of the following equations represents the amount of profits after x months?

A.
y = 1,600 - x
B.
y = 1,600x + x
C.
y = 1,600x
D.
y = x + 1,600