Parallel and Perpendicular Lines Warm Up

Front

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

Back

2

Front

What describes the relationship between two lines with slopes m = 7 and m = -7?

Back

Neither

Front

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

Back

-1/2

Front

True or False: Perpendicular lines have the same slope.

Back

False

Front

What describes the relationship between two lines with slopes m = 3/4 and m = 4/3?

Back

Neither

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 are parallel, what can be said about their slopes?

Back

Their slopes are equal.

Front

If the slope of one line is m, what is the slope of a line perpendicular to it?

Back

-1/m (the negative reciprocal of m).

Front

What is the slope of a line that is horizontal?

Back

0.