Question

помогите с алгеброй

Answer 1

y=kx+b
M(1; -5)
N(4; 1)

-5=k+b,
1=4k+b;

1+5=4k+b-k-b,
b=-5-k;

6=3k,
b=-5-k;

k=2,
b=-7;

y1=2x-7
y2 || y1 => k1=k2 => y2=2x+b
K(1; 7)
7=2+b
b=5
y2=2x+5
Ответ: y=2x+5