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某产品的广告费用x与销售额y的统计数据如下表 广告费用x(万元) 4 2 3 5...
某产品的广告费用x与销售额y的统计数据如下表
广告费用x(万元) | 4 | 2 | 3 | 5 |
销售额y(万元) | 49 | 26 | 39 | 54 |
根据上表可得回归方程
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699573870/SYS201310251241306995738004_ST/0.png)
中的
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699573870/SYS201310251241306995738004_ST/1.png)
为9.4,据此模型预报广告费用为6万元时销售额为( )
A.63.6万元
B.65.5万元
C.67.7万元
D.72.0万元
考点分析:
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