Constant of Proportionality

Front

What is the constant of proportionality?

Back

The constant of proportionality is the unit rate that describes the relationship between two proportional quantities.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the total amount by the number of units.

Front

If a box of cereal costs $3.59 for 30 oz, what is the unit rate per ounce?

Back

12 cents per ounce.

Front

What does a proportional relationship look like on a graph?

Back

A proportional relationship is represented by a straight line that passes through the origin.

Front

What is the equation for a proportional relationship?

Back

The equation is in the form y = kx, where k is the constant of proportionality.

Front

If 624 calories are in 3 servings, what is the unit rate of calories per serving?

Back

208 calories per serving.

Front

What is the difference between proportional and non-proportional relationships?

Back

Proportional relationships have a constant ratio, while non-proportional relationships do not.

Front

How can you determine if a table of values represents a proportional relationship?

Back

If the ratios of corresponding values are constant, it represents a proportional relationship.

Front

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

Back

The cost of gas per gallon is a proportional relationship; as you buy more gallons, the total cost increases at a constant rate.

Front

What is the unit rate of 18.50 for 1 item?

Back

18.50 is the unit rate for 1 item.