Question 1124646
advertising is x, because it is independent and can be controlled.
the response variable, y, is sales, which is not controlled.

Therefore, an increase in 1 rs results in an increase in sales of 5, which means rs 5000, since sales is in units of thousands.  It's like an rpm gauge on a car.  From 1 to 2 is an increase of 1, but it really means 1000 rpm.

D