Rates/Proportions/Proportionality Test Review

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you determine if two ratios form a proportion?

Back

Two ratios form a proportion if the cross products are equal.

Front

What is the constant of proportionality?

Back

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

Front

If a table is proportional, what does that imply about the relationship between the variables?

Back

If a table is proportional, it implies that the relationship between the variables is linear and passes through the origin.

Front

What does it mean if the constant of proportionality is different for each line in a table?

Back

It means that the relationship is not proportional.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply and then isolate the variable.

Front

What is the formula for finding the constant of proportionality?

Back

The constant of proportionality can be found using the formula k = y/x, where y and x are the quantities being compared.

Front

What is a better buy when comparing prices of different quantities?

Back

The better buy is the option that has the lower cost per unit.

Front

If a 12 ounce can of corn costs $1.92 and a 20 ounce can costs $3.00, which is the better buy?

Back

The 20 ounce can is the better buy.

Front

What does it mean for a relationship to be proportional?

Back

A relationship is proportional if it can be represented by a straight line through the origin on a graph.