Slopes of Parallel and Perpendicular Lines Flashcard

Front

What are opposite reciprocals?

Back

Two numbers are opposite reciprocals if their product is -1. For example, 1 and -1 are opposite reciprocals.

Front

What is the slope of a line that is perpendicular to a line with slope m = 3?

Back

The slope of a line that is perpendicular to a line with slope m = 3 is -1/3.

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and will never intersect.

Front

What does it mean for two lines to be perpendicular?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

If the slope of one line is m = 5, what is the slope of a line that is perpendicular to it?

Back

The slope of a line that is perpendicular to m = 5 is -1/5.

Front

What is the slope of a line parallel to a line with slope m = 3/4?

Back

The slope of a line parallel to m = 3/4 is also 3/4.

Front

If two lines have slopes m = 6 and m = -6, what can we say about their relationship?

Back

The lines are neither parallel nor perpendicular.

Front

What is the relationship between the slopes of two perpendicular lines?

Back

The slopes of two perpendicular lines are opposite reciprocals of each other.

Front

If a line has a slope of 0, what type of line is it?

Back

A line with a slope of 0 is a horizontal line.

Front

If a line has an undefined slope, what type of line is it?

Back

A line with an undefined slope is a vertical line.