12/5 - Choose parallel, perpendicular or neither

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They have the same slope.

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees). The product of their slopes is -1.

Front

What does it mean if two lines are neither parallel nor perpendicular?

Back

If two lines are neither parallel nor perpendicular, they intersect at an angle that is not 90 degrees.

Front

How do you determine if two lines are parallel?

Back

Two lines are parallel if they have the same slope.

Front

How do you determine if two lines are perpendicular?

Back

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

Front

What is the slope of the line y = 1/2x - 3?

Back

The slope is 1/2.

Front

What is the slope of the line -2x + y = 1?

Back

Rearranging gives y = 2x + 1, so the slope is 2.

Front

Are the lines y = 1/2x - 3 and -2x + y = 1 parallel, perpendicular, or neither?

Back

They are perpendicular.

Front

What is the slope of the line y = 4x - 2?

Back

The slope is 4.

Front

What is the slope of the line y = -1/4x + 4?

Back

The slope is -1/4.