Ch. 5 Proportional Relationships Vocabulary

Front

Scale Drawing

Back

A drawing that uses a scale to make an object smaller than or larger than the real object.

Front

What is the constant of proportionality?

Back

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

Front

What is the measure of the steepness of a line?

Back

Slope

Front

How can you write the ratio 5:7?

Back

5 to 7

Front

What are matching sides called?

Back

Corresponding Sides

Front

What is a ratio?

Back

A comparison of two quantities by division.

Front

What does it mean for two ratios to be equivalent?

Back

They represent the same relationship between quantities.

Front

What is a proportional relationship?

Back

A relationship between two quantities where the ratio remains constant.

Front

What is the formula for finding the slope of a line?

Back

Slope (m) = (change in y) / (change in x).

Front

What is the y-intercept?

Back

The point where a line crosses the y-axis.