问题
填空题
某商店统计了最近6个月商品的进价x与售价y(单位:元),对应数据如下:
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答案
=. x
(3+5+2+8+9+12)=6.5,1 6
=. y
(4+6+3+9+12+14)=8,1 6
∵回归方程必过点(
,. x
),. y
∴该回归直线必过的定点是(6.5,8).
故答案为:(6.5,8).
某商店统计了最近6个月商品的进价x与售价y(单位:元),对应数据如下:
|
=. x
(3+5+2+8+9+12)=6.5,1 6
=. y
(4+6+3+9+12+14)=8,1 6
∵回归方程必过点(
,. x
),. y
∴该回归直线必过的定点是(6.5,8).
故答案为:(6.5,8).
单词分类。请根据句子的意思,从下面的方框里选出可以填进句子中的单词,并将其字母标号填入答题卷内。 | |
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