Alg 3 8-1

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

• 121
• 4
• 100
• 6

The cost per person to rent a mountain cabin is inversely proportional (varies inversely) to the number of people who share the rent. If the cost is $36 per person when 5 people share, what is the cost per person when 8 people share?

• $22.50
• $57.60
• $1.11
• $12.50

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

Assume y varies inversely with x. If x=7 when y=4, what is y when x=2 ?

• 4
• 14 
• 7
• 28

Assume y varies inversely with x. Given the coordinate (7,4), what is y when x=2 ?

• 4

• 14

• 7

• 28

What does the Direct Variation Equation look like?

• y= kx
• y = mx + b
• y = b
• y = x

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

• Yes; 1/4
• Yes; 4
• Yes; 2
• No

Y varies jointly to the square of z and inversely to the product of w and x.

• y=kz²/wx

• y=kz/wx

• y=wx/kx²

• y=wx/kz