Parallel and Perpendicular Lines

Front

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

Back

Front

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

Back

The slope of a line parallel to a line with slope -4 is -4.

Front

Define parallel lines.

Back

Parallel lines are lines in a plane that never meet and have the same slope.

Front

Define perpendicular lines.

Back

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

Front

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

Back

The slopes of two perpendicular lines are opposite reciprocals.

Front

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

Back

Front

If a line has a slope of -5, what is the slope of a line parallel to it?

Back

The slope of a line parallel to a line with slope -5 is -5.

Front

Write the equation of a line parallel to y = 2x + 1 that passes through the point (1, 3).

Back

Front

Write the equation of a line perpendicular to y = -1/2x + 4 that passes through the point (2, 1).

Back

Front

What is the slope of a line that is perpendicular to a line with slope 0?

Back

The slope of a line that is perpendicular to a line with slope 0 is undefined.