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

How can you identify a proportional relationship on a graph?

Back

A proportional relationship on a graph is represented by 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, expressed as a quantity per one unit of another quantity.

Front

What does it mean if a graph is non-proportional?

Back

A non-proportional graph does not represent a constant ratio between the two quantities, often shown by a line that does not pass through the origin.

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 relationship between x and y if the table shows a constant ratio?

Back

If the table shows a constant ratio, the relationship between x and y is proportional.

Front

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

Back

Two quantities are directly proportional if one quantity increases or decreases in direct relation to the other.

Front

How can you tell if two quantities are not proportional?

Back

Two quantities are not proportional if their ratios are not constant or if a graph of the quantities does not form a straight line through the origin.

Front

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

Back

An example of a proportional relationship is the speed of a car, where distance traveled is proportional to time taken at a constant speed.

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.