Parallel Perpendicular Lines

Which two equations below are perpendicular?

• y = -3x + 2 and y = -2x + 2

• y = 3x + 1 and y = 3x + 1

• y = -x + 1 and y = -x - 2

• y = 3x - 4 and y = -1/3x - 2

Which two equations below are parallel?

• y = 2x + 1 and y = -1/2x + 1

• y = 2x + 3 and y = -2x + 3

• y = 2x - 1 and y = 1/2x - 1

• y = -x + 4 and y = -x + 2

Write the equation of a line PARALLEL to y = 2x + 3 that passes through the point (3, 1).

Write the equation of a line PERPENDICULAR to y = -2x + 1 that passes through the point (2, 3).

Slopes of perpendicular lines are...

• opposite (sign) reciprocals.

• opposites.

• identical.

• always 7.

Tags

CCSS.8.EE.B.5

Slopes of parallel lines are...

• opposite reciprocals.

• opposites.

• the same.

• always 7.

Tags

CCSS.8.EE.B.5

A line is perpendicular to y = 2x + 4

What is the slope of this line?

• -2

• 1/2

• -1/2

• 2

Tags

CCSS.8.EE.B.6

Parallel Lines

• never intersect

• intersect at a 90^o angle

• can be any two lines

Answer explanation

Tags

CCSS.HSG.CO.A.1