Parallel and Perpendicular Slopes

Front

What is the slope of a line perpendicular to y = ½x + 4?

Back

-2

Front

What do we call lines that have slopes that are opposite reciprocals?

Back

Perpendicular lines

Front

If two lines have slopes m = 7 and m = -7, how are they related?

Back

Neither parallel nor perpendicular

Front

If two lines have slopes m = 4 and m = -1/4, how are they related?

Back

Perpendicular

Front

What is the definition of parallel lines in terms of slope?

Back

Parallel lines have identical slopes.

Front

What is the definition of perpendicular lines in terms of slope?

Back

Perpendicular lines have slopes that are opposite reciprocals.

Front

If the slope of one line is 3, what is the slope of a line perpendicular to it?

Back

-1/3

Front

What is the slope of a line parallel to y = -2x + 5?

Back

-2

Front

How do you determine if two lines are parallel?

Back

Check if their slopes are equal.

Front

How do you determine if two lines are perpendicular?

Back

Check if the product of their slopes is -1.