2010 Hunan Question 3 Single-choice Differentiating 2010_省自主命题(湖南) 3.某商品销售量$y$(件)与销售价格$x$(元/件)负相关,则其回归方程可能是 A. $\hat{y} = -10x + 200$B. $\hat{y} = 10x + 200$C. $\hat{y} = -10x - 200$D. $\hat{y} = 10x - 200$ Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →