Parallel and Perpendicular Lines

Front

What are the slopes of perpendicular lines?

Back

The slopes of perpendicular lines are opposite reciprocals.

Front

What are the slopes of parallel lines?

Back

The slopes of parallel lines are identical.

Front

Write the equation of a line perpendicular to y = 3x - 8 that passes through the point (-3, -9).

Back

y + 9 = -1/3(x + 3)

Front

Determine if the following lines are parallel, perpendicular, or neither: Line 1: (15, 20), (17, 18) and Line 2: (-22, -18), (-20, -16).

Back

The two lines are Perpendicular.

Front

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

Back

The slopes of two lines that are parallel are identical.

Front

If the slope of one line is 2, what is the slope of a line that is perpendicular to it?

Back

The slope of a line that is perpendicular to a line with slope 2 is -1/2.

Front

How can you determine if two lines are perpendicular using their slopes?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

What is the slope-intercept form of a line?

Back

The slope-intercept form of a line is y = mx + b, where m is the slope and b is the y-intercept.

Front

If a line has a slope of -3, what is the slope of a line that is parallel to it?

Back

The slope of a line that is parallel to a line with slope -3 is also -3.

Front

What does it mean for two lines to be neither parallel nor perpendicular?

Back

Two lines are neither parallel nor perpendicular if their slopes are different and not opposite reciprocals.