Parallel and Perpendicular Slope

Slopes of perpendicular lines are...

• opposite reciprocals

• opposites

• identical

• reciprocals

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

What slope is perpendicular to:

m = -3

• -3

• -1/3

• 1/3

• 3

What slope is parallel to:  
m = 3/4

• 4/3
• 3/4
• -3/4
• -4/3

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

• Parallel
• Perpendicular
• Neither

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

• Parallel
• Perpendicular
• Neither

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

• Parallel
• Perpendicular
• Neither

A line is parallel to   y = 2x - 7.
What is it's slope?

• -2
• 1/2
• -1/2
• 2

Slopes of parallel lines are...

• opposite reciprocals.
• opposites.
• the same.
• always 7.