Parallel and Perpendicular(2)

Slopes of perpendicular lines are...

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

Slopes of parallel lines are...

• opposite reciprocals.

• opposites.

• same

• always 7.

Are the following equations parallel, perpendicular, or neither?
y =  $\frac{5}{7}$ x - 5 
y =  $-\frac{7}{5}$ x + 3 

• Parallel

• Perpendicular

• Neither

Are the following equations parallel, perpendicular, or neither?
y =  $-\frac{2}{3}$ x + 1 
y =  $-\frac{2}{3}$ x - 7

• Parallel

• Perpendicular

• Neither

Are the following equations parallel, perpendicular, or neither?
y =  $\frac{1}{2}$ x + 4 
y =  $\frac{1}{2}$ x + 9

• Parallel

• Perpendicular

• Neither

Are the following equations parallel, perpendicular, or neither?
y =  $-\frac{2}{3}$ x + 1 
y = 2x + 3

• Parallel

• Perpendicular

• Neither

Are the following equations parallel, perpendicular, or neither?
y =  $\frac{1}{3}$ x + 1

y = -3x + 1 

• Parallel

• Perpendicular

• Neither

What is the slope of the line that is perpendicular to y = -x + 1?

• m = -1

• m = 1

• m = 0

• m = x

What is the slope of the line that is perpendicular to y = -4x + 1?

• m = -4

• m = 4

• m =  $\frac{1}{4}$  

• m = -  $\frac{1}{4}$  

What is the slope of the line that is parallel to y = -x + 1?

• m = -1

• m = 1

• m = 0

• m = x