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國中數學一下3-2

Authored by 康軒 國中

Education

7th Grade

Used 9+ times

國中數學一下3-2
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

已知k為定數且k≠0,若y與x成正比,則x與y的關係式可簡記為下列何者?

xy=k
x-y=k
x+y=k

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

若xy=k,k為定數且k≠0,則x與y的關係為下列何者?_x000B_

y與x成正比
y與x成反比
x與y成正比,也成反比
x與y不成正比,也不成反比

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

已知y與x成正比,且當x=3時,y=9,則下列何者正確?_x000B_

當x=-3時,y=-1
當x=-2時,y=-6
當x=1時,y=27
當x=6時,y=2

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

下列哪一個式子表示y與x成反比?_x000B_

3x+7y=21
3x+7y=0
y=3x+7
3xy+7=0

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

下列何者不能表示y與x成反比?

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

面積為40平方公分的長方形,它的長為x公分、寬為y公分。則可列成關係式為何?_x000B_

y=40+x
y=40-x
xy=40
y=40x

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

設圓的半徑為x,圓周長為y,則x與y的關係式為何?

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