Direct Variation and Inverse Variation Finding the Missing Values

Y varies inversely to x. If y = 0.5 when x = 4, which equation represents this situation?

Ounces of medication vary directly with the weight of the patient. If a 120-pound adult requires 3 ounces of a medication, how many ounces would be needed for a 200-pound adult?

• 2

• 3

• 5

• 9

The point (2,4) is an element of direct variation. Which point is NOT an element of this variation?

• (0, 0)

• (4, 2)

• (1, 2)

• (3, 6)

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

• 26

• 46

• 52

• 92

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

• 50

• 5

• 3.5

• 4.5

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

• 300

• 75

• 1,875

• 12

If the ordered pairs below represent direct variation, find the missing value?

(-4, 16) and (x, -52)

Mathematical Equivalence

ON

If x and y vary directly, what is the missing value in the points (x, 4) and (-14, -8)?

• x = -7

• x = -2.3

• x = 2.3

• x = 7

Suppose j varies inversely with m.
If j = 60 when m = 0.3 , find j when m = -2

• -9

• 9

• 400

• -400

If x and y vary directly, find the missing value : (4, y) , (-6, 15).

Note: Type in your answer directly.

Mathematical Equivalence

ON