Variations Test

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

What kind of variation does this equation show?
y = 6x

• Inverse Variation
• Direct Variation
• No Variation
• Joint Variation

Given the following equation, identify the constant k.
y = 54/x

• There is one.
• k = x
• 54
• y = k

Given (32, 15) and (12, y). Find the constant k, and then find the missing y value.

• 40
• 48
• -40
• -48

Does the table show an inverse variation?

• Yes
• No

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

If x varies inversely as the square root of y, and x = 9 when y = 121, find x when y = 81.

• 7

• 11

• 13

• 17

If x varies inversely as y, and x = 3 when y = 8, find y when x = 4.

• 3

• 6

• 9

• 12