Alg I Flashcardizz:Understanding Parallel and Perpendicular Lines

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).

Front

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

Back

They are parallel.

Front

What is the slope of a line in the form y = mx + b?

Back

The slope is represented by 'm'.

Front

What does it mean for two slopes to be negative reciprocals?

Back

If the slope of one line is m, the slope of the other line is -1/m.

Front

Are the lines y = 3x + 2 and y = 3x - 5 parallel or perpendicular?

Back

They are parallel.

Front

Are the lines y = 4x + 1 and y = -1/4x + 3 parallel or perpendicular?

Back

They are perpendicular.

Front

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

Back

The slope is -2.

Front

If two lines are perpendicular, what is true about their slopes?

Back

Their slopes are opposite reciprocals.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.