Write an equation of a line which passes through the origin.

We know that the coordinate of origin point is (0, 0).

Clearly, x = 0 and y = 0

So, x = y

or x - y = 0 is one of such equation which passes through the origin point.

Write an equation of a line which passes through the origin.

Clearly, x = 0 and y = 0

So, x = y

or x - y = 0 is one of such equation which passes through the origin point.