Direct or Inverse Variation

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

• direct variation

• inverse variation

• neither

• both

The width of a rectangle varies inversely with its length. if the width is 4 when the length is 18, find the width when the length is 8.

• 9

• 72

• 36

• 2

y varies directly as x, if y=12 when x=5, find y when x=3

• 36/5

• 15/12

• 12/5

• 12/15

y varies directly as x, if y=4 when x=3, find x when y=-12

• -16

• 16

• -9

• 9

Points (3,10) and (x, 15) represent a direct variation. Find x.

• 50

• 5

• 3.5

• 4.5

y varies inversely as x, if y = -3 when x = -6, find y when x = 14.

• 11

• -11

• 9/7

• 7/9

Which equation represents an inverse variation?

• y = 40/x

• y = 40x

• y/x = 40

• x = y/40

determine the constant of variation given
{(-15,3)  (-5,1)  (0,0)  (10,-2)}

• -1/5

• 10

• 2

• -5

Which equation below represents a direct variation?

• y = -2x

• y = -3x -5

• y = -1

• x + 3y = 15

If y varies inversely as x and y=2 as x = 8, find x when y= -7

• 1/4

• 4

• 16

• 16/-7