Parallel and Perpendicular Lines

Front

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

Back

4

Front

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

Back

-8/5

Front

What is the slope of a line perpendicular to a line with slope m = 3?

Back

-1/3

Front

Are the lines y = 6x + 2 and y = -6x + 2 parallel, perpendicular, or neither?

Back

Neither

Front

Are the lines y = -2/3x + 2 and y = 3/2x + 9 parallel, perpendicular, or neither?

Back

Perpendicular

Front

What is the definition of parallel lines?

Back

Lines that have the same slope and never intersect.

Front

What is the definition of perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees).

Front

If two lines have slopes m1 and m2, what condition must be met for them to be perpendicular?

Back

m1 * m2 = -1.

Front

What is the slope of a line that is parallel to a line with slope m = -2?

Back

-2

Front

What is the slope of a line that is perpendicular to a line with slope m = 1/4?

Back

-4.