Parallel & Perpendicular Lines

Front

What is the slope of a line parallel to a line with slope m = 4?

Back

The slope of a line parallel to a line with slope m = 4 is also 4.

Front

What are the slopes of perpendicular lines?

Back

The slopes of perpendicular lines are opposite reciprocals.

Front

What is the slope of a line perpendicular to a line with slope m = 5/8?

Back

The slope of a line perpendicular to a line with slope m = 5/8 is -8/5.

Front

Which figure shows a set of perpendicular lines?

Back

Figure 2 shows a set of perpendicular lines.

Front

Are the lines y = 4x + 2 and y = (-1/4)x + 12 perpendicular?

Back

Yes, the lines are perpendicular.

Front

Define parallel lines in terms of slope.

Back

Parallel lines have the same slope.

Front

Define perpendicular lines in terms of slope.

Back

Perpendicular lines have slopes that are opposite reciprocals.

Front

If a line has a slope of -3, what is the slope of a line parallel to it?

Back

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

Front

If a line has a slope of 2, what is the slope of a line perpendicular to it?

Back

The slope of a line perpendicular to it is -1/2.

Front

What is the relationship between the slopes of two lines that are parallel?

Back

The slopes of two lines that are parallel are equal.