Constant of Proportionality and Unit Rates

Janet used 155 beads to create 5 necklaces. What is the constant of proportionality? (How many beads did she use to make each necklace?)

• 31

• 160

• 150

• 775

Is the given table a proportional relationship? If so, what is the constant?

• Yes; 1/3

• Yes; 3

• No

• Yes; 0.3 repeating

Which equation is a proportional relationship?

• y= 4x + 1

• y= 5x-10

• y= 0.5x - 4

• y=7x

Tags

CCSS.7.RP.A.2C

What mathematical operation does unit rates involve?

• addition
• subtraction
• multiplication
• division

Tags

CCSS.7.EE.B.3

What is the cost of 3 pounds of flour if you can buy 6 pounds for $8.56?

• $5.56
• $4.28
• $1.43
• $2.78

Tags

CCSS.6.RP.A.3B

What letter stands for "constant of proportionality"?

• y
• x
• b
• k

Tags

CCSS.7.RP.A.2B

A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct?

• 2.5 cups milk
• 1.75 cups milk
• 2 cups flour
• 2.25 cups milk

Tags

CCSS.7.RP.A.2A

A proportional relationship can be written as an equation in the form ____ = _____  _____

• y = k+x
• y = k-x
• y = kx
• y = k/x

Tags

CCSS.7.RP.A.2C

A unit rate is a rate in which the unit in the denominator is:

• 0

• 3

• 1

• 2

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

You go to the grocery store to buy dog food. The store has three sizes available:

A 20-lb bag for $23.44

An 8-lb bag for $9.88

A 40-lb bag for $49.00

Which size bag has the lowest cost per pound rounded to the nearest cent?

• The 8-lb bag

• The 20-lb bag

• The 40-lb bag

• They cost the same