Kim K. asks you to develop a demand forecast for her perfume line. Using the data provided, you find a regression model, y = 4 - 3.36x₁ + 2.84x₂, with the undernoted parameters.

Parameters: R²= 0.88

Sig of F: 0.04

p-value of x₁= 0.05

p-value of x₂= 0.04

x₁ denotes Selling price

x₂ denotes Advertising

y denotes Demand

Kim asks you the following question please answer her. Would a unit increase in advertising (x₂₎ result in an increase of 2.84 units in Demand (y)?

	a.	Yes, because for a unit increase in x2, y increases by 2.84 units on average, provided x1 is kept constant
	b.	Yes, because for a unit increase in x2, y increases by 2.84 units, provided x1 is kept constant
	c.	Yes, because for a 3.36 units increase in y, x2 increases by 1 unit
	d.	No, because for a unit increase in y, x1 increases by 3.36 unit