Question

From the choices given below, choose the equation whose graph is given in Fig. 7.13.

$\left(i\right)y=x$ $\left(ii\right)x+y=0$ $\left(iii\right)y=2x$ $\left(iv\right)2+3y=7x$

Answer 1

From the graph, we see that points (-1, 1) and (1, -1) satisfy the equation of the line.

$\Rightarrow -x=y\Rightarrow x+y=0$

$\therefore x+y=0$ is the required equation.