Inverse Variation Tables

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 is shown in the graph?

• Direct

• Inverse

Which of the following represents indirect variation?

• y = kx

• y = k/x

• y = x/k

• y = mx + b

Which equation represents an inverse variation?

• y = 40/x

• y = 40x

• y/x = 40

• x = y/40

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

• direct variation

• inverse variation

• neither

• both

If y varies inversely as x, and y = 23 when x = 8, find y when x = 4.

• 26

• 46

• 52

• 92

If y varies inversely as x, and y = 14 when x = 8, find y when x = 7.

• 16

• 20

• 24

• 28

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

• 3

• 6

• 9

• 12

y varies inversely with x. If y = 40 when x = 16, find x when y = -5.

• -64

• -128

• -256

• -512