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 do you find the constant of proportionality?

Back

The constant of proportionality can be found by dividing one quantity by the other in a proportional relationship.

Front

If Melanie buys 2 seashells for $0.80, what is the cost per seashell?

Back

The cost per seashell is $0.40.

Front

What does it mean if a graph passes through the origin?

Back

If a graph passes through the origin, it indicates a proportional relationship between the two variables.

Front

What is the unit rate?

Back

The unit rate is the ratio of two measurements in which the second quantity is one unit.

Front

How do you determine if a relationship is proportional from a graph?

Back

A relationship is proportional if the graph is a straight line that passes through the origin.

Front

What is the constant of proportionality for Rosi who buys 5 seashells for $2.00?

Back

The constant of proportionality is $0.40.

Front

If an airplane travels 3,475 kilometers in 5 hours, what is the unit rate in kilometers per hour?

Back

The unit rate is 695 kilometers per hour.

Front

What does it mean if a relationship is not proportional?

Back

A relationship is not proportional if the ratio between the two quantities is not constant.

Front

What is the cost of renting 3 DVDs at Store A if the cost is $3.15 per DVD?

Back

The cost is $9.45.