Graphs of 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 is the unit rate?

Back

The unit rate is the ratio of two measurements in which the second quantity is one unit. For example, if a car travels 60 miles in 1 hour, the unit rate is 60 miles per hour.

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, often represented as the unit rate.

Front

What does the ordered pair (1, 0.50) represent in a proportional relationship?

Back

The ordered pair (1, 0.50) represents a unit rate where for every 1 unit of the first quantity, there are 0.50 units of the second quantity.

Front

If you can buy 5 shirts for $60, what is the cost of 1 shirt?

Back

The cost of 1 shirt is $12, found by dividing $60 by 5.

Front

What is the formula for finding a proportional relationship?

Back

Front

If 72 ounces serve 12 people, how many ounces does each person get?

Back

Each person gets 6 ounces, found by dividing 72 ounces by 12 servings.

Front

What is the relationship between unit rate and constant of proportionality?

Back

The unit rate is the numerical value of the constant of proportionality in a proportional relationship.

Front

How can you express a proportional relationship using fractions?

Back

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.