# 5. From the choices given below, choose the equation whose graph is given in Fig. 4.6.                    (i)    $y = x$                    (ii)    $x + y = 0$                    (iii)    $y = 2x$                    (iv)    $2 + 3 y = 7x$

$x + y = 0$  satisfies all the above points.
Thus, $x + y = 0$ is the correct equation of the line.