Observe the graph:

The line passing through the origin.

Since is defined  when .

There is point on the graph when .

So, the graph is a linear.

The graph represents linear when .

Consider the points on the graph.

The coordinate points are and .

Find the constant .

                (Equation of direct variation)

               (Substitute ) \ \ Direct variation ratio is

The ratio is constant, so the graph represents a direct variation.

               (Substitute )

Therefore, the direct variation equation is .

Direct; The table represent a equation is .