Theorems for Parallel Lines and Perpendicular Lines

Slopes of parallel lines are...

• negative reciprocals.

• opposites.

• the same.

• always 7.

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Slopes of perpendicular lines are...

• negative reciprocals.

• opposites.

• the same.

• always 7.

y = 3x +2

y = 3x - 3

These lines are...

• Parallel

• Perpendicular

• Neither

Tags

CCSS.HSG.CO.A.1

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

• Parallel
• Perpendicular
• Neither

Tags

CCSS.HSG.CO.A.1

Choose ALL the lines PARALLEL to the following line: y = 2/9x - 7

• y = 2/9x + 8

• y = 9/2x -12

• -2y = 9x + 8

• 9y = 2x -18

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

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

• -2
• 1/2
• -1/2
• 2

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

What slope is parallel to:  
m = 3/4

• 4/3
• 3/4
• -3/4
• -4/3

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

What slope is perpendicular to:  
m = 5/8

• -5/8
• 5/8
• -8/5
• 8/5

Tags

CCSS.8.EE.B.6

y = 5/7x +2
y = 5/7x - 30
These lines are...

• Parallel
• Perpendicular
• Neither

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

y = 6x + 2
y = -6x + 2
These lines are...

• Parallel
• Perpendicular
• Neither