21-22高一·湖南·课后作业
解题方法
1 . 某市对家庭每月用水的收费规定为:若用水量不超过基本月用水量
,则只付基本费8元和损耗费
元(
);若用水量超过基本月用水量,则除了需付基本费和损耗费外,超过部分还需按
元
进行付费.已知该市某家庭1—3月的用水量分别为
,
和
,其支付的费用分别为9元,19元和33元.试写出每月支付费用
(元)关于月用水量
的函数,并画出函数的图象.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf090346d9e8610df47cd19950736998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f00d5d0f323a78951ceb046e68f6e892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91293ad12c4d0812604f29af9bc2aa59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70e55f816b182201ad9a62e86d0b4ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fa882483eec61b3394edc3548211af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fe783f10311be4e71e098027d9d2a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85989d362a00eff3b940d6472cb40e0.png)
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