COP & Unit Rate

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 determine if a graph represents a proportional relationship?

Back

A graph represents a proportional relationship if it is a straight line that passes through the origin (0,0).

Front

What is a unit rate?

Back

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

Front

How do you calculate the unit price?

Back

To calculate the unit price, divide the total price by the number of units. For example, if a 12-pack costs $3.50, the unit price is $3.50 ÷ 12.

Front

If you babysit for 8 hours and earn $72, what is your hourly rate?

Back

Your hourly rate is $72 ÷ 8 = $9 per hour.

Front

If you babysit for 6 hours and earn $57, what is your hourly rate?

Back

Your hourly rate is $57 ÷ 6 = $9.50 per hour.

Front

Which is a better deal: 12 slices of cheese for $2.48 or 10 slices for $2.00?

Back

To find the better deal, calculate the unit price for each. 12 slices for $2.48 = $0.207 per slice; 10 slices for $2.00 = $0.20 per slice. The 10 slices for $2.00 is the better deal.

Front

What does it mean if two quantities are not proportional?

Back

If two quantities are not proportional, it means that the ratio between them is not constant.

Front

How can you tell if a set of data points is proportional?

Back

A set of data points is proportional if the ratios of the corresponding values are equal.

Front

What is the formula for finding the unit rate?

Back

The formula for finding the unit rate is: Unit Rate = Total Quantity / Number of Units.