下列模型()要求<img src="https://nimg.ppkao.com/2018-06/zhanglijun/2018062917170012869.jpg?sign=da156086090de03c639eee5da4d87d12&t=62d24008" />最小。
A、直线趋势模型;
B、二次曲线模型;
C、三次曲线模型;
D、指数曲线模型;
E、龚伯兹曲线模型;
A、直线趋势模型;
B、二次曲线模型;
C、三次曲线模型;
D、指数曲线模型;
E、龚伯兹曲线模型;
A、完成下列反应
(a) P4+HNO3<img src="https://img.ppkao.com/2019-04/wangjing/2019041416320257508.jpg" />
(b) AsCl3+H2O<img src="https://img.ppkao.com/2019-04/wangjing/2019041416320257508.jpg" />
(c) POCl3+H2O<img src="https://img.ppkao.com/2019-04/wangjing/2019041416320257508.jpg" />
(d) P4O10+H2O<img src="https://img.ppkao.com/2019-04/wangjing/2019041416320257508.jpg" />
(e) P4O6+H2O<img src="https://img.ppkao.com/2019-04/wangjing/2019041416320257508.jpg" />
(f) Zn3P2+HCl(稀)<img src="https://img.ppkao.com/2019-04/wangjing/2019041416320257508.jpg" />
A、A.<img src="https://img.ppkao.com/2018-04/zhouyun/2018041117140637692.jpg" />
B.<img src="https://img.ppkao.com/2018-04/zhouyun/201804111714091678.jpg" />
C.<img src="https://img.ppkao.com/2018-04/zhouyun/2018041117141476512.jpg" />
D.<img src="https://img.ppkao.com/2018-04/zhouyun/2018041117142045280.jpg" />
E.<img src="https://img.ppkao.com/2018-04/zhouyun/2018041117142344778.jpg" />
A、A.<img src="https://img.ppkao.com/2017-08/zhangyijie/2017082710372416973.jpg" />
B.<img src="https://img.ppkao.com/2017-08/zhangyijie/2017082710372960187.jpg" />
C.<img src="https://img.ppkao.com/2017-08/zhangyijie/201708271037339403.jpg" />
D.<img src="https://img.ppkao.com/2017-08/zhangyijie/201708271037387388.jpg" />
A、某百货商场1999-2004年的食品销售资料如下:<img src="https://img.ppkao.com/2018-08/zhangxu/2018081915015735005.jpg" />
根据以上资料,采用直线趋势模型进行预测。要求:(保留二位小数)
A、A.<img src="https://img.ppkao.com/2017-09/wangjinchen/2017092509191375598.jpg" />
B.<img src="https://img.ppkao.com/2017-09/wangjinchen/2017092509191686516.jpg" />
C.<img src="https://img.ppkao.com/2017-09/wangjinchen/2017092509192040284.jpg" />
D.<img src="https://img.ppkao.com/2017-09/wangjinchen/2017092509192653582.jpg" />
A、一个估计某行业CEO薪水的回归模型如下:
<img src="https://img.ppkao.com/2019-04/wangxuan/2019041216320323020.jpg" />
A、A.<img src="https://img.ppkao.com/2018-07/wenxueying/2018071610102719826.png" />
B.<img src="https://img.ppkao.com/2018-07/wenxueying/2018071610163534802.png" />
C.<img src="https://img.ppkao.com/2018-07/wenxueying/2018071610115518750.png" />
D.<img src="https://img.ppkao.com/2018-07/wenxueying/2018071610121779280.png" />
A、A.<img src="https://img.ppkao.com/2018-08/yiyu/2018082309360982183.jpg" />
B.<img src="https://img.ppkao.com/2018-08/yiyu/2018082309361248142.jpg" />
C.<img src="https://img.ppkao.com/2018-08/yiyu/2018082309362682033.jpg" />
D.<img src="https://img.ppkao.com/2018-08/yiyu/2018082309364318811.jpg" />
A、A.<img src="https://img.ppkao.com/2017-09/wangjinchen/2017091517302826297.jpg" />
B.<img src="https://img.ppkao.com/2017-09/wangjinchen/2017091517303719706.jpg" />
C.<img src="https://img.ppkao.com/2017-09/wangjinchen/2017091517304272871.jpg" />
D.<img src="https://img.ppkao.com/2017-09/wangjinchen/2017091517304721135.jpg" />
A、A.<img src="https://img.ppkao.com/2016-01/sunsuqin/2016010710095034499.jpg" />
B.<img src="https://img.ppkao.com/2016-01/sunsuqin/2016010710095591281.jpg" />
C.<img src="https://img.ppkao.com/2016-01/sunsuqin/201601071010036907.jpg" />
D.<img src="https://img.ppkao.com/2016-01/sunsuqin/2016010710101164100.jpg" />