Equations of Parallel Perpendicular Lines from a Graph

Write an equation of a line that passes through the point (-9,2) and is perpendicular to the line y = 3x - 12

• y = (-1/3)x - 1

• y = (1/3)x - 2

• y = -3x + 12

• y = 3x - 1

Write an equation of a line that passes through the point (7,10) and is perpendicular to the line y = (1/2)x - 9

• y = -2x - 24

• y = -2x + 12

• y = -2x  + 24

• y = (1/2)x - 12

How can you tell if two lines are perpendicular from the equation

• If the slopes of the two lines are positive reciprocals

• If the slopes of the two lines are negative reciprocals

• If the slopes of the two are equal reciprocals

• If the two lines are not reciprocals

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

• y = 3

• x = -3

• y = -3

• x = 3

The following represents slopes of two lines.  Which answer choice describes the two lines?
m = -1/3 and m = -1/3

• Parallel

• Perpendicular

• Neither

Two lines that intersect to form a right angle

• Perpendicular Lines

• Parallel Lines

• Intersecting Lines

• have no relationship to each other

Find the slope of a line perpendicular to the line below.
y = 2x + 4

• 2

• -1/2

• 1/2

• -2

Write an equation of a line perpendicular to
y = 2x + 3 through (-2, 4)

• y = -3/2x + 3

• y = 3/2x + 3

• y = -1/2x + 3

• y = 3x - 3/2

Slopes of perpendicular lines are...

• opposite (negative) reciprocals.

• opposites.

• identical.

• always 7.

Write an equation that is parallel to the line
y = x - 5 through (1, -2)

• y = -3x +1

• y = x - 3

• y = x + 1

• y = 3x +1