Proportional Relationships Review

The table shows a proportional relationship. Which of the following is the equation for the number of cookies, c made with each cup of sugar, s

• s = 12c

• s = 24c

• c = 12s

• c = 24s

Answer explanation

Divide the y value in the ratio by the x value to get the constant.

Remember the top row is the x and the bottom row is the y in the ratio.

Proportional equations are written y=kx where k is the constant of proportionality.

Replace the x and y with variables they represent in the ratio.

Tags

CCSS.7.RP.A.2C

What is the equation for the proportional graph?

•  $y=4x$  
  

•  $y=\frac{1}{4}x$  
  

•  $x=4y$  
  

•  $x=\frac{1}{4}y$  
  

Answer explanation

Divide the y value in the ratio by the x value to get the constant, k.

Proportional equations are written y = kx. Replace k with the constant you found to from the proportional equation.

Tags

CCSS.7.RP.A.2C

Does the table represent a proportional relationship?

• Yes.
• No.

Tags

CCSS.7.RP.A.2A

You travel 150 miles on 5 gallons. How far did you travel per gallon?

• 15 miles
• 30 miles
• 3 miles
• 25 miles

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Which statement best describes the relationship between x and y in the table?

• Proportional
• Not Proportional

Tags

CCSS.7.RP.A.2A

REVIEW QUESTION
Is this table proportional or non-proportional?

• Proportional
• Non-Proportional
• both
• neither

Tags

CCSS.7.RP.A.2A

Jane wants to triple her lemonade recipe. For two drinks, she mixes 3 lemons with 2 cups of water. What will she need to triple her recipe?

• 6 lemons, 4 cups of water

• 8 lemons, 6 cups of water

• 9 lemons, 6 cups of water

• 12 lemons, 8 cups of water

Tags

CCSS.7.RP.A.2A

What is the constant of proportionality?

• 45

• 50

• 27

• 1

Tags

CCSS.7.RP.A.2B

Determine which equation does NOT represent a proportional relationship.

• y = -2x
• y = 1/2 x
• y = 3x
• y = 5x - 7

Tags

CCSS.7.RP.A.2C

What is the constant of proportionality based on the table above?

• 1/75
• 75
• 1
• 0

Tags

CCSS.4.MD.A.2