Writing Parallel and Perpendicular Lines Flashcard

Front

What are the slopes of parallel lines?

Back

The slopes of parallel lines are the same.

Front

What are the slopes of perpendicular lines?

Back

The slopes of perpendicular lines are opposite reciprocals.

Front

Determine if the lines y = 3x – 7 and y = 3x + 1 are parallel, perpendicular, or neither.

Back

The lines are parallel.

Front

If line a passes through (2, 4) and (4, 7) and line b passes through (-5, 3) and (-3, 6), are the lines parallel, perpendicular, or neither?

Back

The lines are parallel.

Front

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

Back

y = -1/3x + 1.

Front

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

Back

The slope is 2.

Front

What is the slope of a line that is perpendicular to the line y = 2x + 5?

Back

The slope is -1/2.

Front

If two lines have slopes of 4 and -1/4, are they parallel, perpendicular, or neither?

Back

They are perpendicular.

Front

What is the general form of the equation of a line?

Back

The general form is Ax + By + C = 0.

Front

How do you find the slope between two points (x1, y1) and (x2, y2)?

Back

The slope m = (y2 - y1) / (x2 - x1).