direct and indirect variations

In a direct variation, y = 39 when x = 3. 
Find the value of y when x = 2.

• 26
• 3
• 58.5
• 2

Tags

CCSS.7.EE.B.4

CCSS.7.RP.A.2

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

• Yes; 1/4
• Yes; 4
• Yes; 1/2
• No

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

 y varies directly with x, and y is 16 when x is 32. Which equation represents this situation?

• y=32x
• y=16x
• y=2x
• y=(1/2)x

Tags

CCSS.7.EE.B.4

CCSS.7.RP.A.2

If y varies inversely as x and x=5 when y=20, then what is the constant of variation, k? 

• 121
• 4
• 100
• 6

Suppose y varies inversely with x.
If y = 150 when x = 2, find y when x = 25.

• 300
• 75
• 1,875
• 12

Tags

CCSS.7.EE.B.3

CCSS.7.EE.B.4

CCSS.7.NS.A.2

Is the given table a direct or inverse variation? What is the constant of variation?

• Direct, 12
• Inverse, 12
• Direct, 1/12
• Inverse, 1/12

Tags

CCSS.8.F.A.1

CCSS.8.F.A.2

CCSS.8.F.A.3

CCSS.8.F.B.4