Finding the Missing Values of Direct Variation and Inverse Variation

In a direct variation, y=39 when x=3.  Find the value of y when x=2.

• 26

• 3

• 58.5

• 2

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

Is the given table a direct or inverse variation? What is the constant of variation?

• Direct, 12

• Inverse, 12

• Direct, 1/12

• Inverse, 1/12

What ordered pair does a direct variation always go through when graphed?

• (0, 0)

• (1, 0)

• (0, 1)

• (1, 1)

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

Note: Type in your answer directly.

Mathematical Equivalence

ON

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

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

Mathematical Equivalence

ON

Is the given table a direct variation? If so, what is the constant of variation?

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

What type of variation does this scenario represent?
The length of time you charge your cell phone
and the battery power 

• direct variation

• inverse variation

• joint variation

• none of these

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