The demand for video recorders, Qv, has been estimated to be Qv equals to 134 minus 1.07Pf plus 46Pm minus 2.1Pv minus 5I, 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 I is income. Based on the estimated demand equation we can conclude ...

Select one:

a.video recorder film is a substitute for video recorders.

b.video recorders are inferior goods.

c.the demand for video recorders is neither inferior nor inelastic, and video recorder film is not a substitute for video recorders.

d.the demand for video recorders is inelastic

e.none.