Inverse Variation

• direct variation
• inverse variation
• neither direct nor inverse variation

Suppose y varies inversely with x.
If y = 150 when x = 2, find y when x = 25.

• 300

• 75

• 1,875

• 12

If y varies inversely as x, and y = 32 when x = 3, find x when y = 15.

• 3/5

• 8/5

• 16/5

• 32/5

If x varies inversely as the square root of y, and x = 9 when y = 121, find x when y = 81.

• 7

• 11

• 13

• 17

Which of the following is the equation format for inverse variation?

• y = mx + b

• y = kx

• xy=k

What kind of equation is this?
xy = -18

• Linear Equation

• Direct Variation

• Inverse Variation

• Joint Variation

What kind of equation is this?
xy=8

• Linear Equation

• Direct Variation

• Inverse Variation

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

• 40

• 48

• -40

• -48