Direct or Inverse Proportionality

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

Which of the following represents direct variation?

• y = kx

• y = k/x

• y = x/k

• y = mx + b

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

Write an equation for this relationship.

• y=4x

• y=1/8x

• y=1/4x

• y=8x

The value of y is directly proportional to the value of x. If y=35 when x= 140, what is the value of y when x = 70?

• 18

• 29

• 17.5

• 15

Y is directly proportional to the square of z and inversely proportional to w.

• y=kz²/w

• y=kz/w

• y=w/kz²

• y=w/kz

Determine the type of variation:

• Direct

• Inverse

• Neither

Tags

TEKS.MATH.8.5E

The value of y is directly proportional to the value of x. If y = 35 when x = 140, what is the value of y when x = 70?

• 280

• 70

• 17.5

• 4

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

• Yes; 1/4

• Yes; 4

• Yes; 2

• No