REVIEW for Unit 4 dm 23-24

Slopes of parallel lines are...

• opposite reciprocals.
• opposites.
• exactly the same.

• always 7.

Slopes of perpendicular lines are...

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

What slope is parallel to:  
m = 3/4

• 4/3
• 3/4
• -3/4
• -4/3

What slope is parallel to:  
m = 4

• 4
• -1/4
• -4
• 1/4

What is the slope of a line perpendicular to 5?

• 5

• 1/5

• -1/5

• -5

What is the slope of a line perpendicular to -10/3

• -10/3

• 10/3

• 3/10

• -3/10

Are these lines parallel?

y = (-1/2)x + 1

y = (1/2)x - 5

• YES

• NO

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

• YES
• NO

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

• YES
• NO

• Parallel

• Perpendicular

• Neither