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 is constant.

Front

What does it mean if a graph is proportional?

Back

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

Front

What is a non-proportional relationship?

Back

A non-proportional relationship is a relationship where the ratio of one quantity to another is not constant.

Front

How can you tell if a table represents a proportional relationship?

Back

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

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 per one unit of another quantity.

Front

If a car travels 120 miles in 2 hours, what is the unit rate?

Back

The unit rate is 60 miles per hour.

Front

What is the formula for finding a unit rate?

Back

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

Front

What does it mean for a line to be straight in a graph?

Back

A straight line in a graph indicates a constant rate of change between the two variables.

Front

What is the significance of the origin in a proportional graph?

Back

The origin (0,0) is significant in a proportional graph because it indicates that when one quantity is zero, the other quantity is also zero.

Front

Can a curve represent a proportional relationship?

Back

No, a curve cannot represent a proportional relationship; it must be a straight line through the origin.