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 $1,900 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 = 1,900x
B. y = x + 1,900
C. y = 1,900 - x
D. y = 1,900x + x