Question

How would you write an equation for (0, 0); (1, -4) for a coordinate plane? I don't quite understand how linear equations work.

Answer 1

there are many ways to find eqn. i will show you one
one eqn is
(y-y')=m(x-x')
here a point is (x',y')
first find slop m=(y2-y1)/(x2-x1)
here
(x1,y1)=(0,0)
(x2,y2)=(1,-4)
so m=-4
so put a esay point to the eqn so (0,0)
Y=-4X
y+4x=0

or

since one point is zero here so there will be no constant term
so just relate the two point in to a equation (constant should zero)
so
Y+4X=0 (just think)