Parallel and Perpendicular Lines

Front

What is the slope of a line parallel to y = 2x - 7?

Back

2

Front

What do we call roads that do not intersect and are always the same distance apart?

Back

Parallel

Front

What is true about the slopes of two perpendicular lines?

Back

Their slopes are opposite reciprocals.

Front

What do we call streets that cross each other at a right angle?

Back

Perpendicular

Front

What is true about the slopes of two parallel lines?

Back

Their slopes are the same.

Front

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

Back

-1/3

Front

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

Back

They are equal.

Front

If two lines intersect and form a right angle, what type of lines are they?

Back

Perpendicular lines.

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.