Inverse Variation Practice

Which of the following represents the graph below?

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• 
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What are the asymptotes?

• x = -1         y = -3

• x = 1          y = -3

• x = -1         y = 3

• x = 1          y = 3

The amount of time in hours that takes to clean a building varies inversely with the number of custodians. If it takes 7 hours to clean with 10 custodians, how long will it take to clean with 5?

• 3.5

• 14

• 7

• 15

Question: What is the relationship between two variables in direct variation?

• direct variation

• inverse variation

• neither direct nor inverse variation

• direct variation
• inverse variation
• joint variation
• none of these

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

• 300

• 75

• 1,875

• 12

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

• Direct, 12

• Inverse, 12

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

Hint: Find the equation and use it to find the missing value.

• 300

• 75

• 1,875

• 12

Given that y varies inversely with x, if x =7 and y = 4, what is y when x = 2?

• 14

• 10

• 2

• -14

Y varies inversely with x, and y is 0.5 when x is 4. Which equation represents this situation?

Hint: Find the equation.

• y=2x

• y=2/x

• y=4x

• y=x/2