Parallel and perpendicular lines

Which equation is parallel to:
y = 5/7x +2

• y = -7/5x +1
• y = 7/5x +4
• y = -5/7x -3
• y = 5/7x +5

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

• -2
• 1/2
• -1/2
• 2

Are these two graphs going to be perpendicular to each other?
y = 4x + 15
y = 4x + 8

• Yes
• No

Slopes of parallel lines are...

• opposite reciprocals

• opposites

• identical

• reciprocals

Slopes of perpendicular lines are...

• opposite reciprocals

• opposites

• identical

• reciprocals

What is the reciprocal of 1/4

• 4

• -1/4

• 1

• 1/4

What is the opposite reciprocal of 1/4

• 4

• 1

• -4

• 1/4