Rate of Change and Unit Rate

A store sees 120 customers in 8 hours. What is the unit rate (in customers per hour)?

• 16 customers per hour
• 15 customers per hour
• 12 customers per hour
• 20 customers per hour

Will spent $3.75 for 3 pounds of granola. What is his unit rate in dollars per pound?

• $1.25 per pound
• $1 per pound
• $2 per pound
• $1.50 per pound

I paid $15.00 for 6 gallons of gasoline.
What was the price PER gallon?

• $0.40
• $9.00
• $2.50
• $0.90

8.  Find the unit rate of $97.50 for 15 pizzas.

• $6 per pizza
• $82.50 per pizza
• $5.50 per pizza
• $6.50 per pizza

Which is the better buy? a 12 pack of Coke for $3.50 or a six pack of Coke for $1.80?

• The 12 pack of Coke
• The 6 pack of Coke
• Neither
• They are the same

What is the constant of proportionality in this table?

• 3
• 6
• 1.5
• 0.3

The table shows the cost of long distance calls based on the number of minutes used. Is there a constant rate of change, and if so what is it?

• Yes, 10 calls per minute

• Yes, .10 cents per minute

• Yes, .40 cents per minute

• Not a constant rate

What is the constant rate of change?

• Not here.

• $80 per month.

• $82 per month.

• $41 per month.

A rate in which the second quantity is ONE unit is the ___________________.
ex: 50 miles per hour

• Rate of change 
• Proportion
• Unit rate

A rate that describes how a quantity changes in relation to another quantity is _________________.

• the rate of change
• a proportion
• a unit rate