Constant of Proportionalities and Unit Rates

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

Four pounds of bananas cost $6.  What is the cost per pound of bananas?

• $24 per pound
• $1.50 per pound
• $1 per pound
• $6 per pound

It cost me $46.80 to fill my 13-gallon gas tank. What was the price of gas per gallon?

• $3.60

• $3.55

• $3.40

• $3.50

You're throwing a party, and you ordered 15 pizzas for your guests. Your total came to $97.50. What was your unit cost per pizza?

• $4.95 per pizza

• $5.75 per pizza

• $7.25 per pizza

• $6.50 per pizza

Which rate is equivalent to $9 per hour?

• $27 in 3 hours
• $28 in 4 hours
• $33 in 3 hours

What is the constant of proportionality?

• $3.50 per hour

• $7 per hour

• 5 hours per dollar

• $14 per hour

Find the constant of proportionality.

• $360 per hour

• 40 hours per dollar

• $10 per hour

• $9 per hour

Find the unit rate.

• 5 minutes per word

• 10 words per minute

• 15 words per minute

• 20 words per minute

Using the graph above, determine the constant of proportionality.

• r = 0

• r = 1

• r= 3

• r= 6

Which of the following rates of change represents the graph shown?

• 2 boys for every 1 girl
• 0.5 boys for every 1 girl
• 6 boys for every 1 girl
• 3 boys for every 1 girl