Question

Two lines are perpendicular. If one line has a slope of -1/13, what is the slope of the other line?
answers

A. -13
B. 1/13
C. 13
D. -1/13

Answer 1

Hint : product of slopes of perpendicular lines is -1

Answer 2

So it would be the same?

Answer 3

nope, suppose the required slope is \(m\). since the product of slopes is -1 we have :
\[m \left(\frac{-1}{13}\right) = -1\]

solve \(m\)

Answer 4

it would be a positive 13

Answer 5

So my answer would be C.

Answer 6

correct?

Answer 7

Correct !

Answer 8

so would i do that formula for every problem like that?

Answer 9

Yes you may memorize that the slopes of perpendicular lines multiply to -1 :)

Answer 10

ok what if its a positive? would it still be m(1/5)=-1? @ganeshie8

Answer 11

are you given slope of one line and asked to find the slope of a perpendicular line ?

Answer 12

if so, you're right ! just solve m..

Answer 13

The lines below are parellel if the slope of the green line is 1/5 what is the slope of the red line? Its the same question but with a positive slope.

Answer 14

@ganeshie8

Answer 15

m(1/5)=-1 = -5
right?

Answer 16

could you attach the diagram ?

Answer 17

only the slopes of perpendicular lines multiply to -1. not every pair of lines..
i need to see the red and green lines before confirming. .