An employee compiled sales data for a company once each month. The scatter plot below shows the sales (in multiples of $1000) for the company over time (in months). The equation represents the linear model for this data.
y = 0.94x + 12.5
According to the model, how much do the company's sales increase per month?
A.$9400
B.$12,500
C$1250
D.$5000
E.$940