Parallel and Perpendicular Lines

​ (a)   lines never intersect.

​ (b)   lines form right angles.

• Parallel
• Perpendicular

​ (a)   lines have the same slopes.

​ (b)   lines have slopes that are negative reciprocals.

• Parallel
• Perpendicular

Match each line to the one that is parallel to it.

Organize these options into the right categories

Groups:

(a) Parallel

,

(b) Perpendicular

• 
• 
• 
• lines that intersect at right angles

• 
• lines that never intersect

Match each line to the one that is perpendicular to it.

y = 3x +2

y = 3x - 3

These lines are...

• Parallel

• Perpendicular

• Neither

If a line has a slope of -5/6 a line that is parallel has which slope?

• -5/6

• 6/5

• 5/6

• -6/5

If a line has a slope of -5/6 a line that is perpendicular has which slope?

• -5/6

• 6/5

• 5/6

• -6/5

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

• -2
• 1/2
• -1/2
• 2