Parallel, Perpendicular, or Neither

Front

What are parallel lines?

Back

Lines that never intersect and have the same slope.

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees) and have slopes that are opposite reciprocals.

Front

What does it mean if two lines are neither parallel nor perpendicular?

Back

They intersect at an angle that is not 90 degrees and do not have the same slope.

Front

If the slope of one line is m, what is the slope of a line parallel to it?

Back

The slope of a line parallel to it is also m.

Front

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

Back

The slope of a line perpendicular to it is -1/m.

Front

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

Back

The slope is 2.

Front

How do you determine if two lines are parallel using their equations?

Back

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

Front

How do you determine if two lines are perpendicular using their slopes?

Back

If the product of their slopes is -1, then the lines are perpendicular.

Front

What is the slope of a line parallel to y = -3x + 1?

Back

The slope is -3.

Front

What is the slope of a line perpendicular to y = 1/2x - 4?

Back

The slope is -2.