Parallel and Perpendicular Lines

Front

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

Back

-1/3

Front

What is the slope of a line that is perpendicular to a line with slope m = 5/8?

Back

-8/5

Front

If two lines have the same slope, what can we say about them?

Back

They are parallel.

Front

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

Back

4

Front

What do we call the slopes of two lines that are perpendicular to each other?

Back

Opposite reciprocals.

Front

What is the slope of a line that is perpendicular to a line with slope m = -2?

Back

1/2

Front

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

Back

A horizontal line.

Front

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

Back

A vertical line.

Front

What is the relationship between the slopes of parallel lines?

Back

They are equal.

Front

What is the slope of a line that is perpendicular to a line with slope m = 1/4?

Back

-4.