Respuesta :

Answer: (EF) ax+by+c=0

do you know normal vector? vector EF=(7;3) --> normal vector (-3;7)

---> (EF)-3x+7y+c=0. because (EF) passes through E(1;-3) so -3.1+7.(-3)+c=0 ---> c=24

(EF) -3x+7y+24=0

KOF97

Answer:

Step-by-step explanation:

Let's start with an equation:

y=k*x+b

k=(-3-0)/(1-8)=3/7

Now I'm going to plug in E:

-3=3/7*1+b

so b=-24/7

so the equation is:

y=3/7*x-24/7

Let's multiply each term in this equation by seven.

The standard form is:

3x-7y=24