Proportional Relationships & Constant of Proportionality

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

The Williams family bought four concert tickets for $252.  What was the price per ticket?

• $60.00

• $63.00

• $6.30

• $62.00

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

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

Which graph shows a proportional relationship between x and y?

• F

• G

• H

• J

Look at the table below. Write an equation to match the pattern between m, minutes and bubbles blown, b.

• b = 12(m)

• b= m +12

• b = m ÷ 12

• none of these