paralllel and Perpen

If two lines are parallel their slopes are  ____________

• the same.
• negative reciprocals of each other.

Are these lines parallel?

y = (-1/2)x + 1

y = (1/2)x - 5

• YES

• NO

If two lines are perpendicular to each other their slopes are ____________

• the same.

• negative reciprocals of each other.

Are these lines perpendicular?
y = 4x + 2
y = (-1/4)x + 12

• YES
• NO

Are these lines perpendicular?
y = 4x + 2
y = (-1/4)x + 12

• YES
• NO

Are these lines perpendicular?
y = (1/2)x + 2
y = -2x + 13

• YES
• NO

Are these lines perpendicular?
y = 4x + 2
y = (-1/4)x + 12

• YES
• NO

What slope is perpendicular to:  
m = 3

• -3
• -1/3
• 1/3
• 3

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

• Parallel
• Perpendicular
• Neither