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 total amount by the number of units. For example, if you have $3.60 for 3 pounds of apples, the unit rate is $3.60 ÷ 3 = $1.20 per pound.

Front

What does it mean if a table is proportional?

Back

A table is proportional if the ratios of the corresponding values are constant and it passes through the origin (0,0).

Front

If a job pays $56 for 8 hours of work, how much does it pay per hour?

Back

$7 per hour.

Front

What is the unit rate of 150 miles on 5 gallons of gas?

Back

30 miles per gallon.

Front

What is the equation for finding the price of nylon rope per meter if p=0.8L?

Back

The price p (in dollars) is equal to 0.8 times the length L (in meters).

Front

If a store sells 3 pounds of apples for $3.60, how much does 1 pound cost?

Back

$1.20 per pound.

Front

What is a constant unit rate?

Back

A constant unit rate means that the ratio between two quantities remains the same regardless of the amount.

Front

How can you tell if a relationship is not proportional?

Back

A relationship is not proportional if the ratios are not constant or if it does not pass through the origin.

Front

What is the unit rate of 80 miles in 4 hours?

Back

20 miles per hour.