Parallel or Perpendicular?

Front

Back

Front

Back

Front

Back

They are perpendicular (Slopes are opposite reciprocals.)

Front

What is the relationship between the slopes of parallel lines?

Back

The slopes of parallel lines are identical.

Front

What is the relationship between the slopes of perpendicular lines?

Back

The slopes of perpendicular lines are opposite reciprocals.

Front

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

Back

3 (Parallel lines have the same slope.)

Front

If a line has a slope of -4, what is the slope of a line that is perpendicular to it?

Back

Front

Given the equations y = 2x + 1 and y = 2x - 3, are these lines parallel, perpendicular, or neither?

Back

Parallel (Both have the same slope of 2.)

Front

Given the equations y = 3x + 2 and y = -rac{1}{3}x + 1, are these lines parallel, perpendicular, or neither?

Back

Perpendicular (Slopes are opposite reciprocals: 3 and -1/3.)

Front

What is the slope of a line that is neither parallel nor perpendicular to a line with slope 1?

Back

Any slope other than 1 or -1.