Question

From the choices given below choose the equation whose graphs are given in Fig. 4.6

1) y=x
2) x+y=0
3) Y=2x
4) 2+3y=7x​

Answer 1

Don't just look at the graph, observe it.

See the marked points.

(1,-1), (0,0), (-1, 1)

As we can see that x and y are additive inverse of each other i.e we are seeing this pattern x= - y.

For every value of x, we are getting negative value of x in y.

For 1, we have negative of 1

For - 1, we have negative of - 1 i.e - (-1) = 1

For each x, we have y=-x

y=-x

x+y = 0

Answer is x+y=0

The official way is to check by putting the marked values.