Question

I need help, What is the equation in point-slope form of the line passing through (–2, 0) and (2, 8)?.. I got the slope but I am stuck from there, I think the slope is 2

Answer 1

well the equation to get the slope is y2-y1/x2-x1

Answer 2

and to get the point slope form the equation is y – y1 = m(x – x1)

Answer 3

so just plug in the points into the equation

Answer 4

then im really lost

Answer 5

where are you lost?

Answer 6

ok so the equation would be something like y=-2(x+2) ?

Answer 7

(–2, 0) and (2, 8) and the equation has to be y -y1 = m(x - x1)
but the coordinates are like (x1,y1) = (2,8)

Answer 8

do get it a little?

Answer 9

yeah im understanding a little more

Answer 10

but first of all you need to know how to get the slope first do you know the slopes equation??

Answer 11

i mean how to get the slope?

Answer 12

yes thats y2-y1/x2-x1 right

Answer 13

yes and do you know how that works?

Answer 14

yes Ill get a fraction and then i simplify ?

Answer 15

maybe but how did you get 2 in the first place

Answer 16

I got 8/4 somehow and then I dont know what i did

Answer 17

well do you know what y1 and y2 and x1 and x2 is?

Answer 18

the coordinates?

Answer 19

yes and specifically do you know which one it is from this is y1 and y2 and x1 and x2?
(–2, 0) and (2, 8)

Answer 20

0=y1 8=y2 and -2=x1 2=x2

Answer 21

yes

Answer 22

so put it in the equation

Answer 23

8-0/2-(-2) =2/4

Answer 24

8/4 = 2 is m (slope)

Answer 25

so then it would be y-8=2(x-2)
y=2x-6?

Answer 26

wait no

Answer 27

y = 2x - 6 not quite
4-8

Answer 28

y = 2x - 4

Answer 29

but it says it wants it at point slope form just leave it as y-8=2(x-2)

Answer 30

I got that the second time but it doesnt even have that as a choice of an answer.... it has y=2(x-2)

Answer 31

oh then it would be the first coordinate that you must put into the equation.

Answer 32

y - 0 = 2(x + 2)
or
y = 2(x + 2)

Answer 33

okay thank you so much :)

Answer 34

yw