variations

Determine if the relationship between the two quantities is a direct variation. Explain your reasoning.

• yes, the constant of variation is 1/2

• yes, the constant of variation is 2

• no, there is constant of variation.

What is the constant (k) in this inverse variation?
y = 400/x

• x
• y
• 400
• Not enough information given

Tags

CCSS.HSF-LE.A.1B

The number of hours to paint a house varies inversely with the number of painters working. A 2400-square foot house can be painted in 27 hours by 6 painters. How many painters would need to work in order to paint the house in 18 hours?

• 8 painters
• 10 painters
• 9 painters
• 11 painters

y is inversely proportional to x, and y = 8 when x = 3

What is the equation?

• y = 24x

• y = 24/x

• y = 24

• x = 24

Write an equation

The cost C of fish varies directly as its weight w in kilogram.

• C =kw

• W=kc

• K= Cw

• K =w/c

Tags

CCSS.HSF-BF.A.1A

• direct

• inverse

• joint

• combined

Tags

Variations

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

Tags

Variations

Is the following graph direct, inverse, or neither?

• Direct
• Inverse
• Neither

z varies jointly as x and y and z = 60 when x = 5 and y = 6.

Find z when x = 7 and y = 6

• 84

• 60

• 24

• 30

y is directly proportional to x, and y = 24 when x = 4.

What is the value of y when x = 3?

• 18

• 20

• 23

• 43