#4. 3 Writing Equations of Parallel and Perpendicular Lines

Front

What is the slope of parallel lines?

Back

The slopes of parallel lines are the same.

Front

What is the slope of perpendicular lines?

Back

The slopes of perpendicular lines are opposite (sign) reciprocals.

Front

If line A has a slope of 2, what is the slope of a line parallel to it?

Back

The slope of a line parallel to line A is also 2.

Front

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

Back

Front

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

Back

Two lines are parallel if their slopes are equal.

Front

How do you determine if two lines are perpendicular from their equations?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

Back

Front

Back

Front

What is the general form of the equation of a line?

Back

Front

What does it mean for two lines to be skew?

Back

Skew lines are lines that do not intersect and are not parallel.