Understanding Parallel and Perpendicular Lines

Front

What are the slopes of parallel lines?

Back

Identical.

Front

What are the slopes of perpendicular lines?

Back

Opposite reciprocals.

Front

Given the equations y = 3x + 2 and y = 3x - 3, what can we say about these lines?

Back

They are parallel.

Front

Given the equations y = -2/3x + 2 and y = 3/2x + 9, what can we say about these lines?

Back

They are perpendicular.

Front

If Line 1 has points (15, 20) and (17, 18) and Line 2 has points (-22, -18) and (-20, -16), what can we say about these lines?

Back

They are perpendicular.

Front

What is the definition of parallel lines?

Back

Lines that never intersect and have the same slope.

Front

What is the definition of perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees).

Front

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

Back

If their slopes are identical, the lines are parallel.

Front

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

Back

If the product of their slopes is -1, the lines are perpendicular.

Front

What is the slope of a line in the equation y = mx + b?

Back

The slope is represented by 'm'.