名校
1 . 有人收集了七月份的日平均气温
(摄氏度)与某次冷饮店日销售额
(百元)的有关数据,为分析其关系,该店做了五次统计,所得数据如下:
由资料可知,
关于
的线性回归方程是
,给出下列说法:
①
;
②日销售额
(百元)与日平均气温
(摄氏度)成正相关;
③当日平均气温为
摄氏度时,日销售额一定为
百元.
其中正确说法的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
日平均气温![]() | 31 | 32 | 33 | 34 | 35 |
日销售额![]() | 5 | 6 | 7 | 8 | 10 |
由资料可知,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ad8154b42a578b2f1e2b0895dbeae6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e0cecccd89db112b89d7b3c9cb410a.png)
②日销售额
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
③当日平均气温为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec714b7d7a203ecbcef9232ee7d40da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
其中正确说法的序号是
您最近一年使用:0次
2020-05-09更新
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258次组卷
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2卷引用:黑龙江省牡丹江市第三高级中学2024届高三上学期第二次月考数学试题