Im Proportional Relationships

Sherry can buy 4 pounds of oranges for $18.  Write the equation to represent the cost, y, for x oranges.

• y = 4.5x

• y = 72x

• y = 2/9 x

• y = 4x

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.

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90

Which graphs are proportional? Select all.

• A

• B

• C

• D

What is the constant of proportionality? Remember to simplify your answer.

• k=9/3

• k=6

• k=9

• k=3

• y=1

What is the constant of proportionality? Remember to simplify your answer.

• k=5

• k=6

• k=30

• k=1

What is the constant of proportionality? Remember to simplify your answer.

• k=9

• k=10

• k=90

• k=10/9

• k=1

Is this table proportional or non-proportional?

• Proportional

• Non-Proportional

What is the constant of proportionality?

• $3

• $4

• $2

• $9

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

• Yes; 1/3

• Yes; 3

• Yes; 5

• No