Direct Inverse and Joint Variation

The value of y varies directly with x.  Which function represents the relationship between x and y if y = 14 when x = 6. 

• y=20x

• y=84x

• y=7/3x

• y=3/7x

If x and y vary directly, what is the missing value in the points (x, 4) and (-14, -8)?

• x = -7

• x = -2.3

• x = 2.3

• x = 7

Which of the given graphs is a direct variation?

• A

• B

• C

• D

When dealing with direct and inverse variation, the K represents what?

• Kangaroo

• K-Mart's Blue Light Special

• Constant

• King Cobra Snake

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

• 40

• 48

• -40

• -48

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

• direct variation

• inverse variation

• neither

• both

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

Determine the type of variation:

• Direct

• Inverse

• Neither