Parallel/Perpendicular

Slopes of parallel lines are...

• opposite reciprocals.

• opposites.

• identical.

• always 7.

Slopes of perpendicular lines are...

• opposite reciprocals.
• opposites.
• identical.
• always 7.

What slope is parallel to:  
m = 4

• 4
• -1/4
• -4
• 1/4

What slope is perpendicular to:  
m = 5/8

• -5/8
• 5/8
• -8/5
• 8/5

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

Which figure shows a set of parallel lines?

• Figure 1
• Figure 2
• Figure 3
• Figure 4

Which of the following equations has a graph PARALLEL to the line y = 4x + 7 with a y-intercept of -2?

• y = 4x - 2

• y = 4x + 8

• y = 7/2x + 7

• y = -1/4x + 1/2

Which line is perpendicular to

y = 2x - 7 ?

• y = -2x + 8

• y = ¹/₂x - 7

• y = ^-1/₂x + 2

• y = 2x - 3