Inverse Variation and Square Root Functions

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

• 14
• 10
• 2
• -14

x and y vary inversely. Given (5, 20), what is the constant k?

• 4
• 5
• 25
• 100

Does the equation show an inverse variation? 
y=10/x

• yes
• no

Does the table show an inverse variation?

• Yes
• No

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

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

• 300
• 75
• 1,875
• 12

Which equation represents an inverse variation?

• y = 40/x
• y = 40x
• y/x = 40
• x = y/40

If y varies inversely as x and y=2 as x = 8, find x when y= -7

• 1/4
• 4
• 16
• 16/-7

The width of a rectangle varies inversely with its length. if the width is 4 when the length is 18, find the width when the length is 8.

• 9
• 72
• 36
• 2

If y varies inversely as x, and y = 32 when x = 3, find x when y = 15.

• 3/5

• 8/5

• 16/5

• 32/5