Parallel and Perpendicular Lines

Front

Slopes of parallel lines are...

Back

identical

Front

What slope is perpendicular to: m = -3?

Back

1/3

Front

Write the equation of a line perpendicular to y = 3x - 8 and that passes through the point (-3, -9).

Back

y + 9 = -1/3(x + 3)

Front

Which of the following represents the equation of the line passing through (-4, 5) PERPENDICULAR to the line y = -1/2x + 5/2?

Back

y = 2x + 13

Front

Are the two linear equations parallel, perpendicular, or neither?

Back

Perpendicular

Front

Definition of parallel lines in geometry.

Back

Lines that never intersect and have the same slope.

Front

Definition of perpendicular lines in geometry.

Back

Lines that intersect at a right angle (90 degrees) and have slopes that are negative reciprocals.

Front

What is the slope of a line that is perpendicular to a line with a slope of 4?

Back

-1/4

Front

If two lines have slopes m1 and m2, when are they parallel?

Back

When m1 = m2.

Front

If two lines have slopes m1 and m2, when are they perpendicular?

Back

When m1 * m2 = -1.