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Direct Variation, Inverse Variation, And Joint Variation
Test Description: All about relationship between two or more variables.
Instructions: Answer all questions to get your test result.
1) Tell whether x and y show direct variation, inverse variation, or neither: xy = 1/5
A
inverse variation
B
neither
C
direct variation
2) Tell whether x and y show direct variation, inverse variation, or neither: y = x + 4
A
neither
B
inverse variation
C
direct variation
3) Tell whether x and y show direct variation, inverse variation, or neither: 4x = y
A
direct variation
B
neither
C
inverse variation
4) Tell whether x and y show direct variation, inverse variation, or neither: y = 2/x
A
neither
B
direct variation
C
inverse variation
5) Tell whether x and y show direct variation, inverse variation, or neither: x + y = 6
A
neither
B
inverse variation
C
direct variation
6) Tell whether x and y show direct variation, inverse variation, or neither: 8y = x
A
direct variation
B
neither
C
inverse variation
7) Tell whether x and y show direct variation, inverse variation, or neither: y/x = 8
A
neither
B
inverse variation
C
direct variation
8) Tell whether x and y show direct variation, inverse variation, or neither: xy = 12
A
inverse variation
B
neither
C
direct variation
9) y varies inversely with x. If y = -4 when x = 5, find y when x = 3.
A
-12/5
B
-20/3
C
20/3
D
12/5
10) y varies inversely with x. If y = 9 when x = 1, find y when x = 3.
A
y = 27
B
y = -27
C
y = 3
D
y = -3
11) y varies inversely with x. If y = 8 when x = -3, find y when x = 3.
A
y = -8
B
y = 72
C
y = -72
D
y = 8
12) y varies inversely with x. If y = 2 when x = 7, find y when x = 3.
A
y = 14/3
B
y = 63
C
y = -14/3
D
y = -63
13) y varies inversely with x. If y = 28 when x = 3/4, find y when x = 3.
A
y = -7
B
y = 7
C
y = -3
D
y = 3
14) y varies inversely with x. If y = -5/4 when x = -4, find y when x = 3.
A
y = -15/16
B
y = 5/3
C
y = -5/3
D
y = 15/16
15) y varies inversely with x. If y = -1/6 when x = -12, find y when x = 3.
A
y = -2/3
B
y = 2/3
C
y = 3/2
D
y = -3/2
16) y varies inversely with x. If y = -7 when x = 5/3, find y when x = 3.
A
y = 9/35
B
y = -35/9
C
y = -9/35
D
y = 35/9
17) z varies jointly with x and y. When x = 2 and y = -6, z = 24. Find z when x = -4 and y = 5.
A
z = 40
B
z = -20
C
z = -40
D
z = 20
18) z varies jointly with x and y. When x = 8 and y = 6, z = 12. Find z when x = -4 and y = 5.
A
z = 1/5
B
z = -1/5
C
z = -5
D
z = 5
19) z varies jointly with x and y. When x = -1/4 and y = -3, z = 15. Find z when x = -4 and y = 5.
A
z = -400
B
z = 400
C
z = 200
D
z = -200
20) z varies jointly with x and y. When x = 6 and y = -7, z = -3. Find z when x = -4 and y = 5.
A
z = 10/7
B
z = -10/7
C
z = -7/10
D
z = 7/10
*select an answer for all questions
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