What is the slope in the equation:  y=4x+3

• 3
• 4x
• 4
• 3x

If two lines are parallel their slopes are  ____________

• the same.
• negative reciprocals of each other.

Are these lines parallel?
y = 12x + 4
y = 12x +14

• YES
• NO

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 = (1/2)x + 2
y = -2x + 13

• YES
• NO

y = 3x +2

y = 3x - 3

These lines are...

• Parallel

• Perpendicular

• Neither

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

• Parallel
• Perpendicular
• Neither

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

• -2
• 1/2
• -1/2
• 2