Proportional relationships

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other quantity is constant.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the quantity by the number of units. For example, if you have 30 laps in 10 minutes, the unit rate is 30 laps ÷ 10 minutes = 3 laps per minute.

Front

What is a unit rate?

Back

A unit rate is a rate in which the denominator is 1. It expresses how much of one quantity corresponds to one unit of another quantity.

Front

If Kim plants 24 flowers in 2 hours, what is her rate in flowers per hour?

Back

Kim's rate is 12 flowers per hour.

Front

If Ben plants 33 flowers in 3 hours, what is his rate in flowers per hour?

Back

Ben's rate is 11 flowers per hour.

Front

How many scoops of flour does Sasha need to bake 70 cookies if she used 10 scoops for 50 cookies?

Back

Sasha needs 14 scoops of flour to bake 70 cookies.

Front

What is the formula to find the total amount in a proportional relationship?

Back

The formula is: Total Amount = Unit Rate × Number of Units.

Front

If Emily jars 9 liters of jam in 3 days, how many liters does she jar per day?

Back

Emily jars 3 liters of jam per day.

Front

How many days does Emily need to jar 12 liters of jam if she jars 3 liters per day?

Back

Emily needs 4 days to jar 12 liters of jam.

Front

What is the relationship between the number of cookies and scoops of flour in Sasha's baking?

Back

The relationship is proportional; as the number of cookies increases, the number of scoops of flour increases at a constant rate.