Parallel, Perpendicular, or Neither

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They are always the same distance apart and have the same slope.

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Front

What does it mean for lines to be neither parallel nor perpendicular?

Back

Lines that are neither parallel nor perpendicular intersect at an angle that is not 90 degrees and are not equidistant.

Front

How can you determine if two lines are parallel using their slopes?

Back

Two lines are parallel if they have the same slope.

Front

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

Back

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

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

If the equation of a line is y = 2x + 3, what is the slope?

Back

The slope is 2.

Front

If the equation of a line is y = -1/2x + 4, what is the slope?

Back

The slope is -1/2.

Front

Are the lines represented by the equations y = 3x + 1 and y = 3x - 5 parallel, perpendicular, or neither?

Back

They are parallel because they have the same slope (3).