Negative Reciprocals and Perpendicular Slopes

What is the slope of line segment AB if it goes down 2 units and to the right 5 units?

• 2/5

• -2/5

• 5/2

• -5/2

How do you find the slope of a line perpendicular to another line?

• Keep the rise and run the same, but change the sign

• Double the rise and run

• Switch the rise and run, but keep the sign the same

• Switch the rise and run, and change the sign

If the slope of line segment DE is 4/3, what is the slope of a line perpendicular to it?

• -3/4

• -4/3

• 3/4

• 4/3

What happens to the slope when you switch the direction of a line segment?

• The slope becomes negative

• The slope becomes positive

• The slope remains the same

• The slope is inverted

How do you represent a whole number slope as a fraction?

• By adding 1 to the numerator

• By writing it over 1

• By adding 1 to the denominator

• By writing it over 0

What is the negative reciprocal of a slope of 6?

• 6

• -6

• 1/6

• -1/6

What is the slope of a line that is perpendicular to a line with a slope of 0?

• 0

• Undefined

• -1

• 1

Why can't the slope of a vertical line be represented with a number?

• Because it is zero

• Because it is undefined

• Because it is infinite

• Because it is negative

What is the slope of a horizontal line?

• Undefined

• -1

• 1

• 0

What is the relationship between the slopes of two perpendicular lines?

• They are equal

• They are both positive

• They are both negative

• They are negative reciprocals