Black Belt Review Flashcard

Front

A box contains 12 red balls and 24 yellow balls. How many yellow balls are there for every red ball?

Back

2

Front

Label the following graphs as proportional or not proportional: (Yes or Not)

Back

Yes, Not

Front

A plane covers 2,400 miles in 4 hours. What is the unit rate that the plane is traveling per hour?

Back

600 mph

Front

When Leslie was a kid she used to watch dogs for extra money. She was paid $14.00 for watching the bulldog next door for 2 hours. When she watched her cousin’s dog it was just a half an hour. She was paid $3.50. What’s the unit rate for this relationship?

Back

$7.00

Front

A ship covers 1,500 miles in 10 hours. What is the unit rate that the ship is traveling per hour?

Back

150 mph

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the total quantity by the number of units.

Front

What does it mean for a relationship to be proportional?

Back

A relationship is proportional if two quantities maintain a constant ratio.

Front

What is the formula for calculating speed?

Back

Speed = Distance ÷ Time.

Front

If a car travels 300 miles in 5 hours, what is its speed?

Back

60 mph.