Ch. 5 Proportional Relationships Vocabulary

Front

What happens to a figure when the scale factor is greater than one?

Back

The figure undergoes an enlargement.

Front

What is a scale factor?

Back

A ratio used to enlarge or reduce similar figures.

Front

What is the horizontal axis on a coordinate plane called?

Back

x-axis.

Front

What does the slope of a line measure?

Back

The steepness of a line connecting two points.

Front

In the equation y = ½x, what is the constant of proportionality?

Back

1/2.

Front

What is a proportional relationship?

Back

A relationship where two quantities maintain a constant ratio.

Front

What does it mean for two figures to be similar?

Back

They have the same shape but may differ in size.

Front

What is the y-intercept in a linear equation?

Back

The point where the line crosses the y-axis.

Front

How do you find the slope between two points (x1, y1) and (x2, y2)?

Back

Slope = (y2 - y1) / (x2 - x1).

Front

What is the formula for finding the constant of proportionality?

Back

k = y/x, where k is the constant.