Parallel and Perpendicular Lines

Front

What are the slopes of parallel lines?

Back

The slopes of parallel lines are the same.

Front

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

Back

They are parallel.

Front

What is the relationship between the slopes of perpendicular lines?

Back

The slopes of perpendicular lines are negative reciprocals of each other.

Front

Given the equation y = 3x + 2, what is the slope?

Back

The slope is 3.

Front

If line a has a slope of 4, what is the slope of a line parallel to it?

Back

The slope of a line parallel to it is also 4.

Front

What can be concluded if two lines have slopes of 6 and -1/6?

Back

The lines are perpendicular.

Front

What is the slope of a line that is perpendicular to a line with a slope of -2?

Back

The slope is 1/2.

Front

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

Back

Their slopes are neither the same nor negative reciprocals.

Front

What is the slope of the line represented by the equation y = -3x + 4?

Back

The slope is -3.

Front

If line a passes through points (1, 2) and (3, 6), what is the slope of line a?

Back

The slope is 2.