WU 3.3B: Parallel and Perpendicular Slopes

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 is the slope of a line that is parallel to a line with a slope of 3/4?

Back

The slope of a line that is parallel to a line with a slope of 3/4 is also 3/4.

Front

What is the relationship between the slopes of perpendicular lines?

Back

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

Front

If a line has a slope of -1/3, what is the slope of a line that is parallel to it?

Back

The slope of a line that is parallel to a line with a slope of -1/3 is also -1/3.

Front

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

Back

The slope of a line that is perpendicular to a line with a slope of 2 is -1/2.

Front

How can you determine if two lines are parallel using their slopes?

Back

If the slopes of two lines are equal, then the lines are parallel.

Front

What is the slope of a line that is perpendicular to a line with a slope of -4?

Back

The slope of a line that is perpendicular to a line with a slope of -4 is 1/4.

Front

If two lines have slopes of 1/2 and -2, are they parallel, perpendicular, or neither?

Back

They are perpendicular because their slopes are opposite reciprocals.

Front

What is the slope of a line that is parallel to a horizontal line?

Back

The slope of a line that is parallel to a horizontal line is 0.

Front

What is the slope of a line that is perpendicular to a vertical line?

Back

The slope of a line that is perpendicular to a vertical line is undefined.