Writing Parallel and Perpendicular Equations

Front

What is the slope of a line parallel to a line with slope m = 4?

Back

The slope is also 4.

Front

If two lines have the same slope, what can we say about them?

Back

They are parallel.

Front

What is the relationship between the slopes of perpendicular lines?

Back

The slopes are opposite reciprocals.

Front

Write the equation of a line perpendicular to y = 3x + 2 that passes through (9, -2).

Back

y = -1/3x + 1.

Front

What can we conclude if two lines have slopes of -2/3 and 3/2?

Back

The lines are perpendicular.

Front

What is the slope of a line parallel to a line with slope m = -1/4?

Back

The slope is also -1/4.

Front

If the equation of a line is y = 2x + 5, what is the slope of a line parallel to it?

Back

The slope is 2.

Front

What does it mean for two lines to be parallel?

Back

They never intersect and have the same slope.

Front

If the slope of one line is 5, what is the slope of a line perpendicular to it?

Back

The slope is -1/5.

Front

What is the slope of a line that is perpendicular to a line with slope 0?

Back

The slope is undefined (vertical line).