(12) Equations of Proportional Relationships (7th)

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

To find the constant of proportionality, divide one quantity by the other quantity in a proportional relationship.

Front

What is the formula for calculating unit cost?

Back

Unit cost = Total cost / Number of units.

Front

If a 20-lb bag of dog food costs $23.44, what is the cost per pound?

Back

Cost per pound = $23.44 / 20 = $1.17 per pound.

Front

What does it mean if a relationship is not proportional?

Back

If a relationship is not proportional, the ratio between the two quantities is not constant.

Front

How do you determine which option has the lowest cost per unit?

Back

Calculate the cost per unit for each option and compare the values.

Front

What is the constant of proportionality in the equation y = 2x?

Back

The constant of proportionality is k = 2.

Front

If 15 pizzas cost $97.50, what is the cost per pizza?

Back

Cost per pizza = $97.50 / 15 = $6.50 per pizza.

Front

What is the price per ticket if 4 tickets cost $252?

Back

Price per ticket = $252 / 4 = $63.00 per ticket.

Front

What is the relationship between unit cost and total cost?

Back

Unit cost is the total cost divided by the number of units.