Question

Fan + Medal

Answer 1

What is the equation of the line that is perpendicular to -x + y = 7 and passes through (-1, -1)?

Answer 2

-x + y = 2



-x – y = 2



x – y = 2



-x – y = 0



x + y = 0

Answer 3

perpendicular lines have opposite slope for example if your equation have slope a/b

then perpendicular slope should be -b/a flip it and change sign

Answer 4

can you please tell me what is slope of line that you have

Answer 5

How do I find the slope

Answer 6

okay so slope intercept for equation look like this y = mx + b
where m is slope which is always with x and b is y-intercept
so this is your equation -x + y = 7 you have to solve for y
so add x both side to solve for y

Answer 7

y = 7 + x

Answer 8

yes right so what is your slopw

Answer 9

do I plug -1 in for x?

Answer 10

nope there is slope in your equation
just tell me what is that y = x + b

Answer 11

slope intercept for equation look like this y = mx + b
where m is slope which is always with x and b is y-intercept
just like this

Answer 12

I don't get it, so I don't plug in numberS?

Answer 13

no you don't have to
because they didn't give you number to plug in

Answer 14

But like what do I do next than bc I don't understand

Answer 15

okay so y = x + b
like i said before y = mx + b here m is SLOPE which is always with x
what number is with x in your equation

Answer 16

y = xm + 7

Answer 17

there is \(\color{blue}{one}\) bec when we don't have any number at front of variable we can suppose that there is one okay
you don't have to wirte m
your slope is 1

Answer 18

okay so y = 1x + 7

Answer 19

yeah don't have to write 1 bec only x mean coefficient is one

Answer 20

okay so you need perpendicular equation
so perpendicular slope should be opposite what is opposite of 1

Answer 21

-1

Answer 22

yes write

Answer 23

right***

Answer 24

so look at your answer choices and see which equation have negative slope

Answer 25

A. B. C.

Answer 26

yoou have to solve for y first

Answer 27

how

Answer 28

like you did -x + y = 7
how we solved this one look at the top

Answer 29

Is y gonna be a real number?

Answer 30

for abc you have to add x first

Answer 31

What where did abc come in

Answer 32

for C after adding x you still have negative sign so divide by negative