The quantity demanded of Good Z depends upon the price of Z (Pz), monthly income (Y), and the price of a related Good W (Pw). Demand for Good Z (Qz) is given by equation 1 below: Qz = 150 - 8Pz + 2Y - 15Pw
Find the demand equation for Good Z in terms of the price for Z (Pz), when Y is $50 and Pw = $6.