2025年教学资料:3.4 函数的应用(分层作业)(原卷版)
3.4函数的应用分层作业1.小张为自己已经用光话费的手机充值100元,他购买的服务是:20元/月包接听,主叫0.2元/分钟.这个月内,他手机所存话费y(元)与主叫时间t(分钟)之间的函数关系是A.y=100–0.2tB.y=80–0.2tC.y=100+0.2tD.y=80+0.2t2.某汽车油箱中存油22kg,油从管道中匀速流出,200分钟流尽,油箱中剩余量y(kg)与流出时间x(分钟)之间的函数关系式为________.3.某公司市场营销人员的个人月收入与其每月的销售量成一次函数关系,如图所示,由图中给出的信息可知,营销人员没有销售量时的收入是()A.310元B.300元C.390元D.2...
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