配套习题- 利用函数模型解应用题 -【青果学院】

1/3单选题

难度：

1.

如图给出了红豆生长时间t（月）与枝数y（枝）的散点图：那么“红豆生南国，春来发几枝”的红豆生长时间与枝数的关系用下列哪个函数模型拟合最好？（）

A
B
C
D

正确答案：QQ==

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

2/3单选题

难度：

2.为了提高某种农作物的产量，农场通常采用喷施药物的方法控制其高度. 已知该农作物的平均高度y（米）与每公顷所喷施药物的质量x（千克/公顷）之间的关系如图所示，经验表明，该种农作物高度在1.25米左右时，它的产量最高，那么每公顷应喷施药物（　　）千克

A	2.5
B	3
C	3.5
D	4

正确答案：QQ==

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

3/3单选题

难度：

3.一旅馆有100间相同的客房，经过一段时间经营实践，发现每间客房每天的定价与住房率有如下关系：

每间房定价	100元	90元	80元	60元
住房率	65%	75%	85%	95%

要使每天的收入最高，每间房定价应为（）

A	100元
B	90元
C	80元
D	60元

正确答案：Qw==

6Kej5p6Q77ya5YGH6K6+5oi/5Lu35Li6MTAw5YWD5pe277yM5a6i5oi/55qE5pS25YWlPTEwMMOXNjUlw5cxMDA9NjUwMOWFg++8mzxicj7lgYforr7miL/ku7fkuLo5MOWFg+aXtu+8jOWuouaIv+eahOaUtuWFpT0xMDDDlzc1JcOXOTA9Njc1MOWFg++8mzxicj7lgYforr7miL/ku7fkuLo4MOWFg+aXtu+8jOWuouaIv+eahOaUtuWFpT0xMDDDlzg1JcOXODA9NjgwMOWFg++8mzxicj7lgYforr7miL/ku7fkuLo2MOWFg+aXtu+8jOWuouaIv+eahOaUtuWFpT0xMDDDlzk1JcOXNjA9NTcwMOWFg++8mzxicj7iiLTlrqLmiL/nmoTlrprku7fkuLo4MOWFg+aXtu+8jOWuouaIv+eahOaUtuWFpeacgOmrmO+8jOaVhemAiUM=