Parallel and Perpendicular Lines

Front

What are the slopes of parallel lines?

Back

The slopes of parallel lines are identical.

Front

What type of lines are perpendicular?

Back

Perpendicular lines intersect at a right angle (90 degrees).

Front

If two lines have slopes that are opposite reciprocals, what can we say about them?

Back

They are perpendicular.

Front

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

Back

The slope is -8/5.

Front

Which equation represents a line perpendicular to y = -6x + 2?

Back

y = 1/6x + 4.

Front

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

Back

The slopes of two parallel lines are equal.

Front

If the slope of one line is 3, what is the slope of a line perpendicular to it?

Back

The slope is -1/3.

Front

How can you determine if two lines are parallel from their equations?

Back

If their slopes are equal, the lines are parallel.

Front

What is the slope of the line represented by the equation y = 2x + 5?

Back

The slope is 2.

Front

If two lines are neither parallel nor perpendicular, what can be said about their slopes?

Back

Their slopes are neither equal nor opposite reciprocals.