1 . 已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
之间的一组数据为
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
的回归直线方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
必过定点_____
2016-12-01更新
|
1094次组卷
|
3卷引用:2011-2012学年黑龙江省鹤岗一中高二上学期期末考试理科数学(已下线)2011-2012学年黑龙江省鹤岗一中高二上学期期末考试理科数学(已下线)2013-2014学年河南省开封实验学校高一下学期期末练习2数学试卷(已下线)2013-2014学年河南省开封高中实验学校高一下学期期末数学试卷2
2 . 关于某设备的使且年限
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
与所支出的维修费用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(万元)有如下统计资料:
使用年限![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png) | 2 | 3 | 4 | 5 | 6 |
维修费用![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png) | 2.2 | 3.8 | 5.5 | 6.5 | 7.0 |
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
呈线性相关关系,则线性回归方程
![](https://img.xkw.com/dksih/QBM/2012/1/27/1570698147414016/1570698152665088/STEM/39320d1a81a7487a9a2ddfc42db35377.png?resizew=76)
表示的直线一定过定点
____
2012-01-27更新
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1179次组卷
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1卷引用:2011-2012学年黑龙江省牡丹江一中高二上学期期末考试理科数学(已下线)2011-2012学年黑龙江省牡丹江一中高二上学期期末考试理科数学