Answer:
Direct variation is a simple relationship between two variables either.
If we call x and y to these variables, then:
'y' varies directly with x. If x increases 'y' it also increases, if x decreases 'y' decreases.
This relationship can be represented in the following way:
y = mx.
Where m is the rate of change, called "constate of variation" and is also the slope of the line.
Note that when x and y vary directly, the equation of the line always passes through the origin.
Therefore to correctly answer this question look for all the lines that pass through the point (0,0)
