Parallel and Perpendicular Lines

Front

If two lines are perpendicular to each other, their slopes are ____________

Back

negative reciprocals of each other.

Front

Write an equation of a line that passes through the point (-2,3) and is parallel to the line x = 4.

Back

x = -2

Front

Write an equation of a line that passes through the point (2,6) and is parallel to the line y = -3.

Back

y = 6

Front

Are these lines perpendicular? y = (1/2)x + 2, y = -2x + 13

Back

YES

Front

Are these lines parallel? y = (-1/2)x + 1, y = (1/2)x - 5

Back

NO

Front

Definition of parallel lines

Back

Lines that never intersect and have the same slope.

Front

Definition of perpendicular lines

Back

Lines that intersect at a right angle (90 degrees).

Front

What is the slope of a line parallel to y = 3x + 2?

Back

3

Front

What is the slope of a line perpendicular to y = 4x - 1?

Back

-1/4

Front

Equation of a line parallel to y = 2x + 5 that passes through (1, 3)

Back

y = 2x + 1