Tables Equations and Graph

Determine if the table above is proportional and how do you know?

• The table is proportional because the unit rate is a constant 0.33.

• The table is proportional because it passes through the origin.

• The table is proportional because the unit rate is a constant 0.28

• The table is not proportional because the unit rate is not constant.

Tags

CCSS.7.RP.A.2A

How many tbsp of honey is needed for 20 cups of flour?

• 2

• 18

• 25

• 16

Which graph is non-proportional?

• A

• B

• C

• D

Tags

CCSS.7.RP.A.2D

Write an equation for this relationship.

• y = 18x

• y = 18.50x

• y = 22.50x

• y = 22x

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

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.8.EE.B.5

Write an equation for the proportional relationship showing number of cups of pineapple juice, p per recipe, r.

Answer explanation

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

Remember the left column is the x and the right column 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

Does the table represent a proportional relationship?

• Yes.

• No.

Tags

CCSS.7.RP.A.2A

What is the formula for a proportional relationship?

• y=kx

• y=k/x

• z=ykx

• y=ky

Tags

CCSS.7.RP.A.2C

What is the constant of proportionality?

• $3

• $4

• $2

• $9

Tags

CCSS.7.RP.A.2B

Which equation matches the table?

• y = 3x + 9

• y = x + 9 

• y = x + 3

• y = 12x - 3

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2