Independent: Parallel & Perpendicular Equations

Slopes of perpendicular lines are...

• opposite reciprocals

• opposites

• identical

• always negative

y = -2/3x + 2
y = 3/2x + 9
These lines are...

• Parallel

• Perpendicular

• Neither

A line is perpendicular to y = 2x - 7.

What is the slope of the perpendicular line?

• -2

• 1/2

• -1/2

• 2

What slope is perpendicular to:  
m = 5/8

• -5/8

• 5/8

• -8/5

• 8/5

What slope is parallel to:  
m = 4

• 4

• -1/4

• -4

• 1/4

Are the lines parallel, perpendicular, or neither?
 $y=4x+7$   $y=-\frac{1}{4}x+2$  

• Parallel

• Perpendicular

• Neither

Are the lines parallel, perpendicular, or neither?
 $2x+y=5$   $y=-2x+7$  

• Parallel

• Perpendicular

• Neither

Which of the following lines is PARALLEL to the graph of y = -6x + 3 and goes through the point (-1,4)?

• y=1/6x +25/6

• y = 1/6x + 4

• y = -6x - 2

• y = -6x + 4

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

• y = 2x + 13

• y = 2x + 5

• y = -1/2x + 3

• y = -1/4x + 11/2

Write an equation that is perpendicular to y = 2 and passes through the point (3, -1)

• x = -1

• y = x

• x = 3

• y = -5