Question

Get a medal :3

Which is the equation of the line? (Image below in comments)
A. 3x – 5y = 15
B. –5x + 3y = –15
C. 5x – 3y = –15
D. –5x – 3y = –15

Answer 1

it's B
do you want to know how I find it ?

Answer 2

@hidy
Thank you and yes I would like to know to how to find it :3

Answer 3

let's start by the equation of a line it's: y=ax+b

Answer 4

so if you replace in the equation by the point (0,-5)
-->x=0 and y=-5 that will give you the value of b
-5=a*0+b-->b=-5

Answer 5

to find the value of a , you replace again in the equation by (3,0)-->x=3 and y=0
so 0=a*3+b--> 0=a*3-5 -->a=5/3

Answer 6

you replace in the equation
y=(5/3)x-5 --> y=(5x-15)/3 --> 3y=5x-15 --> -5x+3y=-15

Answer 7

Oh okay, thanks for the explanation :3

Answer 8

no problem :)