Parallel & Perpendicular Slope

Front

What is the definition of parallel lines in terms of slope?

Back

Parallel lines have the same slope but different y-intercepts.

Front

What is the definition of perpendicular lines in terms of slope?

Back

Perpendicular lines have slopes that are negative reciprocals of each other.

Front

If two lines have slopes m1 and m2, under what condition are they parallel?

Back

They are parallel if m1 = m2.

Front

If two lines have slopes m1 and m2, under what condition are they perpendicular?

Back

They are perpendicular if m1 * m2 = -1.

Front

What is the slope of a line that is parallel to the line with slope 3/4?

Back

The slope of a line parallel to it is also 3/4.

Front

What is the slope of a line that is perpendicular to the line with slope 3/4?

Back

The slope of a line perpendicular to it is -4/3.

Front

Given the slopes m = 5 and m = -5, what can be said about the lines?

Back

The lines are neither parallel nor perpendicular.

Front

How can you determine if two lines are neither parallel nor perpendicular?

Back

If their slopes are neither equal nor negative reciprocals, they are neither.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.