配套习题- 如何运用待定系数法求一次函数解析式 -【青果学院】

1/5单选题

难度：

1.

已知是一次函数，且满足用待定系数法求=（）

A	`ƒ` (`x`)=2`x`+17
B	`ƒ` (`x`)=3`x`+17
C	`ƒ` (`x`)=`x`+17‍
D	`ƒ` (`x`)=4`x`+17

正确答案：Qw==

PGRpdj7op6PvvJrnlLHpopjmhI/orr48aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvNjEvckJBQ0ZGTU1WY3pEODlaMEFBQUNpZzZUYjJzMDA0LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wMC82MS9yQkFDRkZNTVZjekQ4OVowQUFBQ2lnNlRiMnMwMDQucG5nIiBoZWlnaHQ9IjIyIiB3aWR0aD0iODkiPu+8jDxicj7iiLU8aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvNEYvckJBQ0UxTU1WY3pDVklEVkFBQUNNMzByR2xnMDcwLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy80Ri9yQkFDRTFNTVZjekNWSURWQUFBQ00zMHJHbGcwNzAucG5nIiBoZWlnaHQ9IjIyIiB3aWR0aD0iNjIiPjxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC82MS9yQkFDRkZNTVZjemhxb1k1QUFBQ1J3SHcydk0wMDcucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwLzYxL3JCQUNGRk1NVmN6aHFvWTVBQUFDUndIdzJ2TTAwNy5wbmciIGhlaWdodD0iMjIiIHdpZHRoPSI3MiI+PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzIzLzRGL3JCQUNFMU1NVmN6VDk0aW9BQUFCNWdvZlBtMDMzMC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvNEYvckJBQ0UxTU1WY3pUOTRpb0FBQUI1Z29mUG0wMzMwLnBuZyIgaGVpZ2h0PSIyMCIgd2lkdGg9IjYyIj7vvIw8YnI+4oi0PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwLzYxL3JCQUNGRk1NVmN6d0xWQ3JBQUFFVUVMS282STE2NC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvNjEvckJBQ0ZGTU1WY3p3TFZDckFBQUVVRUxLbzZJMTY0LnBuZyIgaGVpZ2h0PSIyMiIgd2lkdGg9IjI0NSI+77yM5Y2zPGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzIzLzRGL3JCQUNFMU1NVmN5UXpQTXpBQUFDOWlUcTl6czQ3MS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvNEYvckJBQ0UxTU1WY3lRelBNekFBQUM5aVRxOXpzNDcxLnBuZyIgaGVpZ2h0PSIyMCIgd2lkdGg9IjEzMCI+77yMPGJyPuWImTxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC82MS9yQkFDRkZNTVZjeXcxd1FkQUFBQmhWWnJIcnM5NDYucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwLzYxL3JCQUNGRk1NVmN5dzF3UWRBQUFCaFZackhyczk0Ni5wbmciIGhlaWdodD0iMjAiIHdpZHRoPSIzOCI+5LiUPGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzAwLzYxL3JCQUNGRk1NVmMyejMxbTFBQUFDT2ttLTM5UTQyMC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvNjEvckJBQ0ZGTU1WYzJ6MzFtMUFBQUNPa20tMzlRNDIwLnBuZyIgaGVpZ2h0PSIyMCIgd2lkdGg9IjczIj7vvIzop6Plvpc8aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvNEYvckJBQ0UxTU1WYzN5SDQ3NUFBQUNLUTBKQmFFNTMxLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy80Ri9yQkFDRTFNTVZjM3lINDc1QUFBQ0tRMEpCYUU1MzEucG5nIiBoZWlnaHQ9IjIyIiB3aWR0aD0iNzQiPu+8mzxicj7iiLQ8aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvNjEvckJBQ0ZGTU1WYzJDZVJvVUFBQUNvZ2dnaEhrMjM5LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC82MS9yQkFDRkZNTVZjMkNlUm9VQUFBQ29nZ2doSGsyMzkucG5nIiBoZWlnaHQ9IjIyIiB3aWR0aD0iOTYiPi48L2Rpdj4=

2/5单选题

难度：

2.

如果一次函数图象经过A、B两点（如图），则该一次函数的解析式为（）

青果学院

A
B
C
D

正确答案：Qw==

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

3/5单选题

难度：

3.

若一次函数图象经过点（-2，1），截距是3，则一次函数的解析式是（）

A
B
C
D

正确答案：QQ==

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

4/5单选题

难度：

4.

如图，将直线OA向上平移1个单位，得到一个一次函数的图象，那么这个一次函数的解析式是（）

青果学院

A
B
C
D

正确答案：RA==

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

5/5单选题

难度：

5.

一次函数与坐标轴围成的三角形面积为8，则这个一次函数解析式为（）

A
B
C
D

正确答案：Qw==

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