The demand for video recorders has been estimated to be linear and given by the demand relation Qv = 145 ? 3.2Pv + 7M ? 0.95Pf ? 39Pm, where Qv is the quantity of video recorders, Pf denotes the price of video recorder film, Pm is the price of attending a movie, Pv is the price of video recorders, and M is income. Based on the estimated demand equation we can conclude:
A. video recorders are normal goods and the demand for video recorders is inelastic.
B. video recorders are normal goods and video recorder film is a complement for video recorders.
C. the demand for video recorders is inelastic.
D. video recorders are normal goods.
Answer: B
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