Parallel and Perpendicular Lines

Front

What are the slopes of perpendicular lines?

Back

The slopes of perpendicular lines are opposite reciprocals.

Front

What is the relationship between the slopes of parallel lines?

Back

The slopes of parallel lines are identical.

Front

If two lines have the same slope, what can we say about them?

Back

They are parallel.

Front

If the slopes of two lines are negative reciprocals of each other, what can we say about them?

Back

They are perpendicular.

Front

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

Back

The slope is 'm'.

Front

Given the equations y = 5/7x + 2 and y = 5/7x - 30, are these lines parallel, perpendicular, or neither?

Back

These lines are parallel.

Front

Given the equations y = 3/2x + 2 and y = 2/3x + 6, are these lines parallel, perpendicular, or neither?

Back

These lines are neither.

Front

What is the slope of the line y = 6x + 2?

Back

The slope is 6.

Front

What is the slope of the line y = -6x + 2?

Back

The slope is -6.

Front

If two lines are neither parallel nor perpendicular, what can we infer about their slopes?

Back

Their slopes are neither identical nor negative reciprocals.