Parallel & Perpendicular Lines

How can we tell if two lines are perpendicular?

• Slope is different
• Slope is opposite reciprocal
• Slope is equal
• No way to tell

Tags

CCSS.HSG.CO.A.1

What is the slope of a line parallel to the line whose equation is
-2x + y = - 7?

• 2
• 1/2
• -1/2
• -2

Tags

CCSS.8.EE.B.5

y = 3/2x + 2
y = 2/3x + 6
These lines are...

• Parallel
• Perpendicular
• Neither

Tags

CCSS.8.EE.B.6

What slope is perpendicular to
m = 5/8

• -5/8
• 5/8
• -8/5
• 8/5

Tags

CCSS.8.EE.B.6

What slope is parallel to:  
m = 3/4

• 4/3
• 3/4
• -3/4
• -4/3

Tags

CCSS.8.EE.B.6

A line is perpendicular to    y = 2x - 7.
What is the slope of the perpendicular line? 

• -2
• 1/2
• -1/2
• 2

Tags

CCSS.8.EE.B.6

A: y = 2x + 3
B: y = 2x − 5
C: y = -2x + 3
Which lines are parallel?

• A and B
• B and C
• A and C
• All three!

Tags

CCSS.HSG.CO.A.1

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

• Parallel
• Perpendicular
• Neither

Tags

CCSS.8.EE.B.6

What is the slope of a line parallel to the line whose equation is:  -6x + 3y = 5 ?

• -2
• -1/2
• 1/2
• 2

Tags

CCSS.8.EE.B.6

Given the line    y = 9x - 7.
What is the slope of a perpendicular line? 

• -9
• 1/9
• -1/9
• 9

Tags

CCSS.8.EE.B.6