Constant of Proportionality and Unit Rates

Front

You can buy 36 cookies for $4. What is the unit rate (in cookies per dollar)?

Back

9 cookies per dollar

Front

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

Back

$8 per pound

Front

Elijah earns $200 for 8 hours of work. What is the unit rate (in dollars per hour)?

Back

$25 per hour

Front

What has to be true about a unit rate?

Back

It is always "per" one thing.

Front

Which of these is not a unit rate?

• 70 miles per hour
• $15 per pound
• 15 pages per 20 minutes
• 1000 meters per kilometer

Back

15 pages per 20 minutes

Front

Find the unit rate.

Back

$9 per hour

Front

Find the unit rate: $3.50 per hour, $7 per hour, 5 hours per dollar, $14 per hour

Back

$3.50 per hour

Front

Find the unit rate.

Back

15 words per minute

Front

Sargento cheese slices $2.48 for 10 slices
or
Velveeta Cheese slices $3.18 for 12 slices
Find the unit price for each and choose the better deal.

Back

Sargento

Front

Does this graph represent a proportional relationship?

Back

No