Front

What are the slopes of parallel lines?

Back

Identical.

Front

What is the slope of a line perpendicular to a line with slope 5?

Back

-\frac{1}{5}.

Front

What are the slopes of perpendicular lines?

Back

Opposite reciprocals.

Front

Which slope would be parallel to the line represented by the equation y=3x - 4?

Back

m=3.

Front

If two lines have slopes m=-\frac{1}{3} and m=-\frac{1}{3}, what relationship do they have?

Back

Parallel.

Front

Define parallel lines in terms of their slopes.

Back

Parallel lines have identical slopes.

Front

Define perpendicular lines in terms of their slopes.

Back

Perpendicular lines have slopes that are opposite reciprocals.

Front

What is the slope of a line perpendicular to a line with slope -2?

Back

\frac{1}{2}.

Front

If a line has a slope of 0, what type of line is it?

Back

A horizontal line.

Front

If a line has an undefined slope, what type of line is it?

Back

A vertical line.