Proportional Relationships Constant of Proportionality

Identify the constant of proportionality.

• k = 2

• k = 4

• k = 1/2

• k = 1/4

• none (not proportional)

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound

• $5 per pound

• $35 per pound

• 0.125 pounds per dollar

What is the ratio of red apples to green apples

• 7 apples to 3 green

• 4 red apples to 7 apples

• 4 red apples to 3 green apples

• 3 green apples to 4 red apples

Lynnette can wash 95 cars in 5 days. How many cars does she wash each day?

• 475 cars per day

• 19 cars per day

• .05 cars per day

• 15 cars per day

What is the constant of proportionality?

• X $3

• X $4

• X $2

• X $9

The constant of proportionality can also be called the _____________.

• unit rate

• ratio rate

• proportion answer

• rational number

The constant of proportionality is also the unit rate.

• True

• False

Is this table Proportional?

• Yes, because the COP is different each time.

• Yes, because the COP is always X9.

• No, because the numbers are all different.

• No, because the COP changes each time.

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

• Yes; X 1/3

• Yes; X 3

• Yes; X 5

• No

Which graph is NOT proportional?

• A

• B

• C

• D