配套习题-用待定系数法求一次函数解析式 -【青果学院】

本课配套习题挑战模式1/5

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单选题

难度系数：

1.若一次函数y=kx+17的图象经过点（-3，2），则k的值为（　　）

A: -6

B: 6

C: -5

D: 5

提示1：55Sx5LiA5qyh5Ye95pWw57uP6L+H77yILTPvvIwy77yJ77yM5pWF5bCGeD0tM++8jHk9MuS7o+WFpeS4gOasoeWHveaVsOino+aekOW8j+S4re+8jOW+l+WIsOWFs+S6jmvnmoTmlrnnqIvvvIzmsYLlh7rmlrnnqIvnmoTop6PljbPlj6/lvpfliLBr55qE5YC877yO
答案：RA==
6Kej77ya55Sx5LiA5qyh5Ye95pWweT1reCsxN+eahOWbvuixoee7j+i/h+eCue+8iC0z77yMMu+8ie+8jDxicj7mlYXlsIZ4PS0z77yMeT0y5Luj5YWl5LiA5qyh5Ye95pWw6Kej5p6Q5byP5b6X77yaMj0tM2srMTfvvIw8YnI+6Kej5b6X77yaaz0177yMPGJyPuWImWvnmoTlgLzkuLo177yOPGJyPuaVhemAiUQ=

本课配套习题挑战模式2/5

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单选题

难度系数：

2.

已知关于x的一次函数，其中实数k满足0＜k＜1，当自变量x在1≤x≤2范围内时，此函数的最大值为( )

A:
1

B:
2

C:
k

D:
2k

提示1：PHA+55Sx5LqO6Ieq5Y+Y6YeP55qE5Y+W5YC85bey57uP56Gu5a6a77yM5q2k5Ye95pWw5Y+I5Li65LiA5qyh5Ye95pWw77yO5omA5Lul5bqU55u05o6l5oqK6Ieq5Y+Y6YeP55qE5pyA5bCP5YC85LiO5pyA5aSn5YC85Luj5YWl5Ye95pWw5rGC5YC877yOPC9wPg==
答案：Qw==
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

本课配套习题挑战模式3/5

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单选题

难度系数：

3.已知y-2与x成正比例，且x=2时，y=4，若点（m，2m+7）在这个函数的图象上，则m的值是（）

A: -2

B: 2

C: -5

D: 5

提示1：5bey55+leS0y5LiOeOaIkOato+avlOS+i++8jOWPr+iuvuWHuuWFs+ezu+W8j+S4unktMj1reO+8jHg9MuaXtu+8jHk9NOaXtu+8jOWPr+W+l+WHuuWHveaVsOWFs+ezu+W8j++8jOWwhueCue+8iG3vvIwybSs377yJ5Luj5YWl5Ye95pWw5byP5Y2z5Y+v5b6X6Kej77yO
答案：Qw==
6Kej77ya6K6+5Ye95pWw5byP5Li6eS0yPWt477yM5Y2zeT1reCsy77yMPGJyPuWPiHg9MuaXtu+8jHk9NO+8jDxicj7ljbM0PTJ4KzLvvIzlvpdrPTHvvJs8YnI+5Y2z5Ye95pWw5byP5Li677yaeT14KzLvvI48YnI+5Luj5YWl54K577yIbe+8jDJtKzfvvInvvIw8YnI+5pyJ77yaMm0rNz1tKzLvvIw8YnI+6Kej5b6X77yabT0tNe+8jjxicj7mlYXpgIlD77yO

本课配套习题挑战模式4/5

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单选题

难度系数：

4.如图，过A点的一次函数的图象与正比例函数y=2x的图象相交于点B，这个一次函数的表达式是( )

A: y=2x+3

B: y=x-3

C: y=x+3

D: y=3-x

提示1：5qC55o2u5q2j5q+U5L6L5Ye95pWw5Zu+6LGh56Gu5a6aQeeCueWdkOagh+WGjeagueaNruWbvuixoeehruWumkLngrnnmoTlnZDmoIfvvIzorr7lh7rkuIDmrKHlh73mlbDop6PmnpDlvI/vvIzku6PlhaXkuIDmrKHlh73mlbDop6PmnpDlvI/vvIzljbPlj6/msYLlh7rvvI4=
答案：RA==
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

本课配套习题挑战模式5/5

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单选题

难度系数：

5.已知直线y=kx-4（k＜0）与两坐标轴所围成的三角形面积等于4，则直线的解析式为( )

A: y=-x-4

B: y=-2x-4

C: y=-3x+4

D: y=-3x-4

提示1：6aaW5YWI5rGC5Ye655u057q/eT1reC0077yIa++8nDDvvInkuI7kuKTlnZDmoIfovbTnmoTkuqTngrnlnZDmoIfvvIznhLblkI7moLnmja7kuInop5LlvaLpnaLnp6/nrYnkuo4077yM5b6X5Yiw5LiA5Liq5YWz5LqOa+eahOaWueeoi++8jOaxguWHuuatpOaWueeoi+eahOino++8jOWNs+WPr+W+l+WIsOebtOe6v+eahOino+aekOW8j++8jg==
答案：Qg==
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本课配套习题挑战模式1/5

本课配套习题挑战模式2/5

本课配套习题挑战模式3/5

本课配套习题挑战模式4/5

本课配套习题挑战模式5/5

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