Direct/Inverse Variation

Which of the following represents direct variation?

• y = kx
• y = k/x
• y = x/k
• y = mx + b

Tags

CCSS.8.EE.B.5

CCSS.8.EE.B.6

CCSS.8.F.A.3

CCSS.8.F.B.4

 Y varies directly with x, and y is 84 when x is 16. Which equation represents this situation?

• y=1344x
• y=100x
• y=5.25x
• y=4/21x

Tags

CCSS.8.EE.B.6

CCSS.8.F.B.4

Write an equation for this relationship.

• y=4x
• y=1/8x
• y=1/4x
• y=8x

Tags

CCSS.8.EE.B.5

CCSS.8.EE.B.6

CCSS.8.F.A.3

CCSS.8.F.B.4

Is the given table a direct variation? If so, what is the constant?

• Yes; 1/4
• Yes; 4
• Yes; 2
• No

Tags

CCSS.8.EE.B.5

CCSS.8.F.B.4

Is this a direct variation?
y=2x

• yes
• no

Tags

CCSS.8.EE.B.5

CCSS.8.EE.B.6

CCSS.8.F.A.3

CCSS.8.F.B.4

Is this proportional?

• yes
• no

Tags

CCSS.8.EE.B.5

CCSS.8.EE.B.6

CCSS.8.SP.A.1

CCSS.8.SP.A.2

Is this proportional?

• yes
• no

Tags

CCSS.8.EE.B.5

Which of the given graphs is a direct variation?

• A
• B
• C
• D

Tags

CCSS.8.EE.B.5

What ordered pair does a direct variation always go through when graphed?

• (0, 0)
• (1, 0)
• (0, 1)
• (1, 1)

Tags

CCSS.8.EE.B.6

What is the constant of proportionality (in miles per hour) based on the table?

• 45
• 90
• 135
• 2

Tags

CCSS.8.EE.B.5

CCSS.8.F.B.4

CCSS.8.SP.A.3