Variation Review

Which graph shows direct variation?

• A
• B
• C
• D

Tags

CCSS.8.EE.B.5

Which variation is represented in the graph?

• Direct
• Inverse
• Neither

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

• 0.15
• 117
• 58.5
• 26

If y varies inversely with x and if y = 15 when                x = 32, find y when x = 12.

• 25.6
• 40
• 5.63
• 5760

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

• y=1344x
• xy=1344
• y=5.25x
• xy=5.25

Write an equation for this relationship.

• y=4x
• y=1/8x
• y=1/4x
• xy=16

Tags

CCSS.6.EE.C.9

The number of words Maria typed varied directly with the amount of time she spent typing. If she typed 275 words in 5 minutes, how long would it take her to type 1,100 words? 

• 60500 minutes
• 20 minutes
• 55 minutes
• 4 minutes 

The number of hours to clean a house varies inversely with the number of cleaners working. A house can be cleaned in 27 hours by 6 cleaners. How many cleaners would need to work in order to clean the house in 18 hours?

• 4 cleaners
• 10 cleaners
• 9 cleaners
• 36 cleaners

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

The equation 
xy =  25  represents:

• direct variation
• inverse variation
• Neither