Proportionality Retest 23-24

Front

What is proportionality?

Back

Proportionality refers to the relationship between two quantities where their ratio remains constant. If one quantity increases, the other increases at a consistent rate.

Front

What is the constant of proportionality?

Back

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

Front

How do you calculate the total cost including sales tax?

Back

To calculate the total cost including sales tax, multiply the total price by the sales tax rate (as a decimal) and add it to the original total price.

Front

If 15 bags of groceries weigh 45 pounds, how much does one bag weigh?

Back

One bag weighs 3 pounds (45 pounds ÷ 15 bags).

Front

How do you find the weight of a different number of bags based on a known total?

Back

To find the weight of a different number of bags, multiply the weight of one bag by the number of bags.

Front

What is the formula for percent decrease?

Back

Percent decrease = ((original value - new value) / original value) x 100.

Front

How do you convert inches to centimeters?

Back

To convert inches to centimeters, multiply the number of inches by 2.5.

Front

What is the total amount spent if an item costs $25 and sales tax is 6%?

Back

Total amount = item cost + (item cost x sales tax rate). For $25, total = $25 + ($25 x 0.06) = $26.50.

Front

If a video game costs $25 and you buy 7, what is the total cost before tax?

Back

Total cost before tax = price per game x number of games = $25 x 7 = $175.

Front

How do you calculate the total weight of multiple bags?

Back

Total weight = weight of one bag x number of bags.