Inverse Variation

What is the equation for inverse variation?

• y = k/x

• y = k * x

• y = k + x

• y = k^x

If x and y are inversely proportional, what happens to y when x increases?

• y stays the same.

• y increases.

• y becomes zero.

• y decreases

If y varies inversely with x, and y = 10 when x = 5, what is the value of y when x = 2?

• 25

• 12

• 5

• 2.5

If y varies inversely with x, and y = 6 when x = 4, what is the value of x when y = 9?

• 4

• 8/3

• 3

• 2

If y varies inversely with x, and y = 12 when x = 3, what is the value of y when x = 6?

• 8

• 4

• 6

• 2

If y varies inversely with x, and y = 8 when x = 2, what is the value of x when y = 16?

• 4

• 1

• 2

• 6

If y varies inversely with x, and y = 15 when x = 5, what is the value of x when y = 9?

• 7.5

• 10

• 8.33

• 12

If y varies inversely with x, and y = 20 when x = 10, what is the value of y when x = 15?

• 40/3

• 25/2

• 30/5

• 10/3

If y varies inversely with x, and y = 18 when x = 6, what is the value of x when y = 12?

• 4

• 6

• 15

• 9

If y varies inversely with x, and y = 24 when x = 8, what is the value of y when x = 4?

• 12

• 48

• 16

• 32