multiple choice question! constant variations??? The equation of the line on the graph below is a direct variation equation. What is the constant of variation?

direct variation means
y= kx
for some k.
I would pick an (x,y) pair off the graph, and use those numbers to replace x and y
in y=kx
then "solve" for k
(btw, don't use (0,0) because that won't work)