Slopes - Parallel & Perpendicular Lines

Front

What are the slopes of perpendicular lines?

Back

Opposite reciprocals.

Front

What are the slopes of parallel lines?

Back

The same.

Front

If two lines are parallel, what can be said about their slopes?

Back

Their slopes are equal.

Front

What slope is parallel to m = 3/4?

Back

3/4.

Front

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

Back

-1/2 (opposite reciprocal of 2).

Front

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

Back

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

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 slope of a line that goes through the points (1, 2) and (3, 6)?

Back

Slope (m) = (6 - 2) / (3 - 1) = 4/2 = 2.

Front

What is the relationship between the slopes of two lines that are neither parallel nor perpendicular?

Back

Their slopes are neither equal nor opposite reciprocals.