Identifying 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 can you identify a proportional relationship from a table?

Back

A proportional relationship can be identified if the ratios of corresponding values are equal.

Front

What does it mean if a table does not show a proportional relationship?

Back

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

Front

If Newtown middle school spends 11 dollars on every yearbook, what is the cost per yearbook?

Back

The cost per yearbook is $11.

Front

Is the total cost of yearbooks proportional to the number of yearbooks bought?

Back

Yes, because the cost per yearbook is constant.

Front

What is the constant of proportionality in a proportional relationship?

Back

The constant of proportionality is the ratio that relates the two quantities in a proportional relationship.

Front

If x = 2 and y = 6, is the relationship proportional?

Back

Yes, if the ratio y/x = 3 is constant for other values.

Front

What is an example of a proportional relationship in real life?

Back

An example is the relationship between distance and time when traveling at a constant speed.

Front

What does it mean for two quantities to be directly proportional?

Back

It means that as one quantity increases, the other quantity increases at a constant rate.

Front

What is the formula for finding the constant of proportionality?

Back

The formula is k = y/x, where k is the constant of proportionality.