Proportions from Tables

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value (k) that relates two proportional quantities.

Front

How do you find the constant of proportionality from a table?

Back

Divide the values of one quantity by the corresponding values of the other quantity.

Front

If 9 songs cost $8.85, what is the unit rate per song?

Back

The unit rate is $0.985 per song.

Front

What is a unit rate?

Back

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

Front

How do you determine if a table represents a proportional relationship?

Back

A table represents a proportional relationship if the ratios of the corresponding values are constant.

Front

What is the formula to find the unit rate?

Back

Unit Rate = Total Quantity / Number of Units.

Front

If 405 rotations occur in 5 minutes, how many rotations occur in 1 minute?

Back

81 rotations per minute.

Front

What does it mean if a table is not proportional?

Back

It means that the ratios of the corresponding values are not constant.

Front

How can you fill in missing values in a ratio table?

Back

Use the constant of proportionality to find the missing values.