Direct Variation

Which of the given graphs is a direct variation?

• A

• B

• C

• D

Is this a direct variation?

• yes

• no

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

• 26

• 3

• 58.5

• 2

The value of y varies directly with x.  Which function represents the relationship between x and y if y = 14 when x = 6. 

• y=20x

• y=84x

• y=7/3x

• y=3/7x

Y varies directly as x. If y = 12 when x = 15, what is y when x = 20?

• 4/5

• 17

• 16

• 25

Y varies directly as x. If y = 39 when x = 52, what is the best answer for k?

• k = 52

• k = 4/3

• k = 3/4

• k = 39/52

Y varies directly with x, and y is 84 when x is 16. Which equation represents this situation?

• y=1344x

• y=100x

• y=5.25x

• y=4/21x

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

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

• 26

• 3

• 58.5

• 2

y varies directly with x. When y = 39,  x = 3.  Find the value of y when x = 2.

• 26

• 3

• 58.5

• 2