**Q.5.** From the choices given below, choose the equation whose graphs are given in Fig. 4.6 and Fig. 4.7.

For Fig. 4. 6 |
For Fig. 4.7 | |||

(i) y = x |
(i) y = x + 2 | |||

(ii) x + y = 0 |
(ii) y = x - 2 | |||

(iii) y = 2x |
(iii) y = -x + 2 | |||

(iv) 2 + 3y = 7x |
(iv) x + 2y = 6 |

**Solution:**

In fig. 4.6, points on the line are (0, 0), (-1, 1) and (1, -1). If we put all these points in equation the four given equations, we see that LHS and RHS are equal for equation (ii) x + y = 0 for all the value of the points. Therefore this is the correct equation.

In fig. 4.7, points on the line are (-1, 3), (0, 2) and (2, 0). If we put all these points in equation the four given equations, we see that LHS and RHS are equal for equation (iii) y = -x + 2 for all the value of the points. Therefore this is the correct equation.