HELP ILL MARK YOU BRAINLIST write in y=mx+b form HELP ILL MARK YOU BRAINLIST write in y=mx+b form

Answer:
(12,3)=x1,y1
m=-1/4
we have,
y-y1=m(x-x1)
y-3=-1/4(x-12)
4y-12=-x+12
x+4y-21=0 is the required eqn