Direct & Inverse Variation Warm Up

• direct variation

• inverse variation

• neither direct nor inverse variation

• direct variation

• inverse variation

• neither direct nor inverse variation

The equation 
xy =  25  represents:

• direct variation

• inverse variation

• none of these

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

• Yes; 1/4

• Yes; 4

• Yes; 2

• No

What is the constant (k) in this inverse variation?

• 12

• 24

• 48

• Not enough information given

What is the constant (k) in this inverse variation?
y = 400/x

• x

• y

• 400

• Not enough information given

Which of the following is NOT a direct variation?

• y = -2x

• y = 1/2x

• 2x + 3y = 2

• 3y = 4x

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

• yes

• no

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

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

Which of the given graphs is a direct variation?

• A

• B

• C

• D