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From the choices given below choose the equation whose graphs are given in fig (a) and fig(b) For fig (a) (i) y=x (ii)x+y=0 (iii)y=2x (iv)2+3y=7xFor fig (b) (i) y=x+2 (ii)y=x-2 (iii)y=-x+2 (iv)x+2

Answer»

Solution :In FIG (a) we observe that the points (-1,1) SATISFY the EQUATION x+y =0
At (-1,1), x+y=-1+1=0
and at (1,-1) , x+y=1-1=0
In fig (B) we observe that the points (-1,3),(0,2) and (2,0) and (2,0) satisfy the equation uy =-x+2 ,
x+y =2.
(At (-1,3), x+y =-1 +(+3)=2
At (0,2), x+y=0+2=2
and at (2,0) , x+y = 2+0=2


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