Question

Find the direct variation equation of the graph through the points (0, 0) and (1, -2). Write in y=kx form.

can someone explain this to me?

Answer 1

please

Answer 2

let y=mx+c
put (0,0),
0=0+c
c=0
therefore, y=mx
m=slope = (-2-0)/(1-0) = -2
the required equation is y=-2x