24-25 Alg1 3-6 FLASHCARD - Parallel & 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). Their slopes are opposite reciprocals.

Front

How do you find the slope of a line given two points (x1, y1) and (x2, y2)?

Back

Front

What is the slope-intercept form of a linear equation?

Back

Front

How do you determine if two lines are parallel using their slopes?

Back

Two lines are parallel if their slopes are equal.

Front

How do you determine if two lines are perpendicular using their slopes?

Back

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

Front

What is the slope of the line given by the equation y = 2x + 5?

Back

The slope (m) is 2.

Front

What is the slope of a line that is perpendicular to a line with a slope of 3?

Back

Front

Write the slope-intercept form of a line that passes through the point (1, 2) and has a slope of 4.

Back

Front

If a line has a slope of -1/2, what is the slope of a line parallel to it?

Back