某商店用调低价格的方式促销
个不同的玩具,调整后的单价
(元)与调整前的单价
(元)满足一次函数关系,如表:
已知这
个玩具调整后的单价都大于
元.
(1)求
与
的函数关系式,并确定
的取值范围;
(2)某个玩具调整前单价是
元,顾客购买这个玩具省了多少钱?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
第 | 第 | 第 | 第 | 第 | ||
调整前的单价 | ||||||
调整后的单价 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)某个玩具调整前单价是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74fff35cf1ffeef5fa1e7ad51d849ef0.png)
更新时间:2023-07-13 10:47:36
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【推荐1】我国传统的计重工具——秤的应用,方便了人们的生活,如图1,可以用秤砣到秤纽的水平距离,来得出秤钩上所挂物体的重量,称重时,若秤杆上秤砣到秤纽的水平距离为
(厘米)时,秤钩所挂物重为
(斤),如表中为若干次称重时所记录的一些数据.
(1)在图2中将表
,
的数据通过描点的方法表示,观察判断
,
的函数关系,并求秤杆上秤砣到秤纽的水平距离为
厘米时,秤钩所挂物重是多少斤?
(2)已知秤砣到秤纽的最大水平距离为
厘米,这杆秤的可称物重范围是多少斤?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/6/5dd9353c-ddca-45df-87ab-1990204ed12a.png?resizew=395)
(1)在图2中将表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
(2)已知秤砣到秤纽的最大水平距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6f1af4b44b2e97e8f319bab4ae9010.png)
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【推荐2】如图,一次函数
与反比例函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6898d181faf9e6cc9957f3102f8d3d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
为常数,
的图象在第一象限内交于点
,且与
轴、
轴分别交于
,
两点.
(1)求一次函数和反比例函数的表达式;
(2)点
在
轴上,且
的面积等于
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b18b1b57bcabd7599be74f70e149f6ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6898d181faf9e6cc9957f3102f8d3d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149cc2b83646528579a46d5ed2ee820e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0657a0bbdd272c0f5659d460410e67c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a8e93cd7ba1d81a8f03566b199db61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/ff134b26-4d52-48e2-bc8d-4860712a15c0.jpg?resizew=177)
(1)求一次函数和反比例函数的表达式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3a59286a54977376102034a3338f38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】某市自来水公司为限制单位用水,每月只给某单位计划内用水3000吨,计划内用水每吨收费1.8元,超计划部分每吨按2.0元收费.
(1)写出该单位水费
(元)与每月用水量
(吨)之间的函数关系式;
①当用水量小于等于3000吨时:________;
②当用水量大于3000吨时:________.
(2)某月该单位用水3200吨,水费是________元;若用水2800吨,水费________元.
(3)若某月该单位缴纳水费9400元,则该单位用水多少吨?
(1)写出该单位水费
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
①当用水量小于等于3000吨时:________;
②当用水量大于3000吨时:________.
(2)某月该单位用水3200吨,水费是________元;若用水2800吨,水费________元.
(3)若某月该单位缴纳水费9400元,则该单位用水多少吨?
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【推荐2】某宾馆客房部有
个房间供游客居住,当每个房间的定价为每天
元时,房间可以住满.每个房间每天的定价每增加
元时,就会有一个房间空闲.设每个房间每天的定价增加
元.
(1)求房间每天的入住量
(间)关于
(元)的函数关系式;
(2)若对有游客入住的房间,宾馆需对每个房间每天支出
元的各种费用.某一天,该宾馆客房部举行让利促销活动,这天的总利润为
元,问这天每个房间的定价是多少元?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aad0f4f7f47ac83100121fd7a2fa6e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4717df730dfbfc10110ef70c268419ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f43677db00ba65a7f96fc49627d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求房间每天的入住量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若对有游客入住的房间,宾馆需对每个房间每天支出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f179a5e46197a7f5f5646fefd47c1989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595a1f691c789cd39899392f7853b9d2.png)
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