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 quantity is constant.

Front

True/False: The point (4, 2) means that 4 cookies were purchased for $2.

Back

True

Front

Which graph shows a proportional relationship between x and y?

Back

Graph F shows a proportional relationship.

Front

What is the constant of proportionality in the relationship represented by the table?

Back

The constant of proportionality is 8.

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 of one.

Front

What is the unit rate in this proportional relationship: 60 miles/1 hour?

Back

The unit rate is 60 miles per hour.

Front

Find the Unit Rate: 72 ounces for 12 servings.

Back

The unit rate is 6 ounces per serving.

Front

How do you find the constant of proportionality from a table?

Back

Divide the y-value by the corresponding x-value for any pair of values.

Front

What does a straight line through the origin on a graph indicate?

Back

It indicates a proportional relationship between the two variables.

Front

If the constant of proportionality is 4, what does that mean?

Back

It means for every 1 unit of x, y increases by 4 units.