名校
1 . 某种产品的广告费支出
与销售额
(单位:万元)之间有如下对应数据:
![](https://img.xkw.com/dksih/QBM/2017/12/22/1843827803922432/1844837115912192/STEM/66f3fe5451574655b02e728badba94c4.png?resizew=576)
(1)求回归直线方程
(2)试预测广告费支出为
万元时,销售额多大? 参考数据:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/2017/12/22/1843827803922432/1844837115912192/STEM/66f3fe5451574655b02e728badba94c4.png?resizew=576)
(1)求回归直线方程
(2)试预测广告费支出为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a54991e1e73caf95421a4abac1bea1.png)
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2017-12-23更新
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493次组卷
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4卷引用:云南省泸水市第一中学2017-2018学年高二上学期期中考试数学试题