Parallel and Perpendicular Lines

Front

What is the slope of a line parallel to a line with slope m?

Back

The slope of a line parallel to a line with slope m is also m.

Front

What is the slope of a line perpendicular to a line with slope m?

Back

The slope of a line perpendicular to a line with slope m is -1/m.

Front

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

Back

They are parallel.

Front

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

Back

They are perpendicular.

Front

What is the slope of the line represented by the equation y = 3x + 1?

Back

The slope is 3.

Front

What is the slope of the line represented by the equation y = -2x + 4?

Back

The slope is -2.

Front

Given the equation 2y = 4x + 8, what is the slope of the line?

Back

The slope is 2.

Front

What can be concluded if two lines have different slopes?

Back

They are neither parallel nor perpendicular.

Front

What is the slope of a line parallel to the line represented by the equation x + 2y = 6?

Back

The slope is -1/2.

Front

If the equations of two lines are y = 5/7x + 2 and y = 5/7x - 30, what is their relationship?

Back

They are parallel.