Parallel and Perpendicular Lines

Front

What are the slopes of perpendicular lines?

Back

Opposite reciprocals.

Front

What is the slope of a line parallel to y = 3x + 2?

Back

3

Front

What is the slope of a line perpendicular to y = -4x + 1?

Back

1/4

Front

If two lines have the same slope, what are they?

Back

Parallel.

Front

If the slopes of two lines are negative reciprocals, what is the relationship between the lines?

Back

Perpendicular.

Front

What is the slope of a line perpendicular to y = 5x - 3?

Back

-1/5

Front

Are the lines represented by y = 2x + 1 and y = 2x - 4 parallel, perpendicular, or neither?

Back

Parallel.

Front

What is the slope of a line parallel to y = -1/3x + 2?

Back

-1/3

Front

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

Back

Horizontal.

Front

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

Back

Vertical.