Direct & Inverse Variation

Which of the given graphs is a direct variation?

• A

• B

• C

• D

Determine the type of variation:

• Direct

• Inverse

• Neither

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

• 121

• 4

• 100

• 6

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

If x and y are in an inverse variation then which of the following is correct?

• x - y = constant

• x + y = constant

• xy = constant 

• x⁄y is constant 

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

• y=2x

• y=2/x

• y=4x

• y=x/2

The image is an example of the graph of a(n)

• direct variation

• inverse variation

• neither

• both

• Direct

• Inverse

• niether

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

• 4

• 14 

• 7

• 28

Which of the following represents direct variation?

• y = kx

• y = k/x

• y = x/k

• y = mx + b