题干

某玩具厂生产一种玩具,据市场调查,若按每个玩具280元销售时,每月可销售300个,若销售单价每降低1元,每月可多售出2个,据统计,每个玩具的固定成本Q(元)与月销量y(个)满足如下关系:

月销量y(个)

160

200

240

300

每个玩具的固定成本Q(元)

60

48

40

32

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