Constant of Proportionality Review

Front

What is the constant of proportionality?

Back

The constant of proportionality is the ratio between two proportional quantities, often represented as the unit rate.

Front

How do you find the constant of proportionality?

Back

You find it by dividing the y value by the x value in a proportional relationship.

Front

What does a rate of 50 miles per hour describe?

Back

It describes the distance traveled (miles) in relation to time (hours).

Front

If you ordered 15 pizzas for $97.50, how do you calculate the unit cost per pizza?

Back

Divide the total cost by the number of pizzas: $97.50 ÷ 15 = $6.50 per pizza.

Front

When comparing quantities, how do we express the relationship?

Back

We express it as y over x.

Front

Which is a better buy: a 12-pack of Pepsi for $3.50 or a 6-pack for $1.80?

Back

The 12-pack is a better buy.

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.

Front

What is the formula for calculating unit price?

Back

Unit price = Total price ÷ Number of units.

Front

If a car travels 150 miles in 3 hours, what is its constant speed?

Back

The constant speed is 50 miles per hour (150 miles ÷ 3 hours).

Front

What does it mean if two quantities are proportional?

Back

It means that as one quantity changes, the other quantity changes at a constant rate.