Proportions Vocabulary

Front

What is the ratio that compares the change in y (dependent variable) to the change in x (independent variable)?

Back

rate of change

Front

What is the rational number that describes the proportional relationship between two variables, represented by the letter k in the equation y=kx?

Back

constant of proportionality

Front

What is an equation in which two ratios are set equal to one another?

Back

proportion

Front

What is the result of multiplying the numerator of one ratio by the denominator of another, and if the products are equal, the ratios are proportional?

Back

Cross Products Property of Proportions

Front

What is a rate for ONE of something, always written as a ratio with a denominator of ONE?

Back

unit rate

Front

What is the formula for calculating the constant of proportionality in a direct variation?

Back

k = y/x

Front

How can you determine if two ratios are proportional using cross products?

Back

If the cross products are equal, the ratios are proportional.

Front

What does a slope represent in a graph?

Back

The rate of change between the dependent and independent variables.

Front

What is the relationship between unit rates and proportions?

Back

Unit rates can be used to compare ratios and determine proportional relationships.

Front

What is the significance of the constant of proportionality in real-world applications?

Back

It helps to understand how one quantity changes in relation to another.