You work for a company in the marketing department. Your manager has tasked you with forecasting sales by month for the next year. You notice that over the past 12 months sales have consistently gone up in a linear fashion, so you decide to find a regression equation for the company's sales history. You find that the regression equation for the data is (sales) = 21.211*(time) + 10.411. Interpret the slope.

Question 3 options:

1)When time increases by 1 month, sales increases by 10.411 units.

2)We are not given the dataset, so we cannot make an interpretation.

3)When time increases by 1 month, sales increases by 21.211 units.

4)When sales increases by 1 unit, time increases by 21.211 months.

5)When sales increases by 1 unit, time increases by 10.411 months.