Question

What is the equation of the line that contains the points (3, –6) and (–3, 0)?
A.

y = x – 3
B.

y = –x – 3
C.

y = –x + 3
D.

y = x + 3

Answer 1

ill give medal

Answer 2

first of all you have to find the slope

Answer 3

ok

Answer 4

do you know how to find the slope?

Answer 5

you use the equation : (y2-y2)/(x2-x1)

Answer 6

y2-y1*

Answer 7

so its 3,3 right

Answer 8

what is 3,3?

Answer 9

idk

Answer 10

you just substitute into the equation :
(3,-6) (-3,0)
y2 = 0
y1 = -6
x2 = -3
x1= 3

Answer 11

so basically what would you get? (keeping in mind that the equation is y2-y1/x2-x1

Answer 12

y=x+3

Answer 13

right

Answer 14

nope, try it again
look : it would be 0--6/ -3-3 = 6/-6 = -1 so the slope would be -x

Answer 15

and the three would be positive

Answer 16

right

Answer 17

so basically we have found that the slope is -x, but we dont know what the y-intercept is, so for now, our equation is y=-x+c where c is the unknown y-interecept,
so you substitute into this equation using one of the points such as (-3,0)
so 0 = - (-3) + c
so 0 = 3 +c
so c = -3

Answer 18

ahh i get it now thank you

Answer 19

you're welcome :)