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

Back

The slope of a parallel line is also 2.

Front

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

Back

The slope of a perpendicular line is -1/2 (the opposite reciprocal).

Front

How do you determine if two lines given in slope-intercept form are parallel?

Back

Check if their slopes are equal.

Front

How do you determine if two lines given in slope-intercept form are perpendicular?

Back

Check if the product of their slopes is -1.

Front

Back

The slope is 4.

Front

Back

The slope is -1/3.

Front

Given the points (1, 2) and (3, 6), what is the slope of the line through these points?

Back

The slope is 2.