Parallel & Perpendicular Slope

Front

What are the slopes of perpendicular lines?

Back

Opposite reciprocals.

Front

What is the slope of a line perpendicular to -10/3?

Back

3/10

Front

Are the lines shown Parallel, Perpendicular, or Neither?

Back

Parallel

Front

What is the slope of a line perpendicular to a line with slope -6/5?

Back

5/6

Front

What is the slope of a line perpendicular to 5?

Back

-1/5

Front

Define slope in the context of a line.

Back

Slope is a measure of the steepness of a line, calculated as the rise over run.

Front

What is the slope of a horizontal line?

Back

0

Front

What is the slope of a vertical line?

Back

Undefined.

Front

If two lines have slopes m1 and m2, when are they parallel?

Back

They are parallel if m1 = m2.

Front

If two lines have slopes m1 and m2, when are they perpendicular?

Back

They are perpendicular if m1 * m2 = -1.