Equations of Parallel and Perpendicular Lines

Front

What is the slope of parallel lines?

Back

The slopes of parallel lines are equal.

Front

What is the slope of perpendicular lines?

Back

The slopes of perpendicular lines are opposite reciprocals.

Front

Back

Front

If a line is shifted up 3 units, what happens to its equation?

Back

The y-intercept increases by 3.

Front

Which equation is parallel to the x-axis and goes through the point (2, 5)?

Back

Front

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

Back

Front

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

Back

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and never intersect.

Front

What does it mean for two lines to be perpendicular?

Back

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

Front

How do you write the equation of a line given a slope and a point?

Back