Question

Help!!
The equation of line WX is y = −2x − 5. Write an equation of a line perpendicular to line WX in slope-intercept form that contains point (−1, −2).

Answer 1

I think it's y=-1/2x+3/2

Answer 2

you hae to take the negative recripcoal
so if you are given a slope

2 or 2/1
then u need
-1/2 as the perpendicular slope


or if u are given -2 or -2/1
then
-(-1/2) = 1/2 slope

Answer 3

from that you know the slope has to be 1/2

y=1/2 x + b
can you solve for b , given the point (-1,-2)

Answer 4

How would I plug those in?

Answer 5

Or how do I solve it?

Answer 6

a point is giving you a y value for some x value

-1,-2 means at x=-1 y=-2

Answer 7

y=1/2x+b
sub in the point (-1,-2)
-2=1/2(-1)+b
now solve for b

Answer 8

So it's y=-1/2x-3/2

Answer 9

i toold you why that cant be xD

Answer 10

Oh sorry y=1/2x-3/2?

Answer 11

yep

Answer 12

Thank you so much, can you check another one for me?

Answer 13

ok sure

Answer 14

Line QR contains (2, 8) and (3, 10) Line ST contains points (0, 6) and (−2, 2). Lines QR and ST are
I think the answer is "Parallel, because the slopes are the same"

Answer 15

can u show me how u are finding the slope for these 2 lines

Answer 16

For QR I have y2-y1/x2-x1. 10-8/3-2 = 2/1 = 2

For ST I have 2-6/(-2)-0= -4/-2= 2

Answer 17

good :)

Answer 18

you are right

Answer 19

And they are parallel not perpendicular right?

Answer 20

ya same slope

Answer 21

y=mx+b
if they have the same slope, then the only difference will be the y intercept so it will be the same line shifted up or down

Answer 22

I have an answer choice that says the same thing except perpendicular

Answer 23

Thank you so much! :)

Answer 24

oops typo

Answer 25

oh you are welcome :)