slopes of 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 their relationship?

Back

If two lines have the same slope, they are parallel.

Front

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

Back

If two lines have slopes that are negative reciprocals of each other, they are perpendicular.

Front

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

Back

The slope of the line is 3.

Front

What is the slope of the line represented by the equation y = -2x + 5?

Back

The slope of the line is -2.

Front

Given the equations y = 4x + 1 and y = 4x - 3, are these lines parallel, perpendicular, or neither?

Back

These lines are parallel.

Front

Given the equations y = 1/2x + 2 and y = -2x + 3, are these lines parallel, perpendicular, or neither?

Back

These lines are perpendicular.

Front

What is the slope of a line that is horizontal?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a line that is vertical?

Back

The slope of a vertical line is undefined.