slope of Parallel & Perpendicular Lines

Front

What are the slopes of perpendicular lines?

Back

Opposite reciprocals.

Front

What does it mean if two lines are parallel?

Back

They have identical slopes.

Front

What is the slope of a line perpendicular to y = 2x + 4?

Back

-1/2

Front

How can you determine if two lines are parallel, perpendicular, or neither?

Back

Compare their slopes: Parallel lines have the same slope, perpendicular lines have slopes that are opposite reciprocals.

Front

What is the slope of the line represented by the equation y = 3x + 2?

Back

3

Front

If two lines have slopes of 3 and -1/3, what is their relationship?

Back

They are perpendicular.

Front

What is the slope of the line represented by the equation y = -4x + 1?

Back

-4

Front

If two lines are represented by the equations y = 3x + 2 and y = 3x - 3, what is their relationship?

Back

They are parallel.

Front

What is the slope of a line that is horizontal?

Back

0.

Front

What is the slope of a line that is vertical?

Back

Undefined.