Question

Check whether the point (a, -a) lies on y = x - a or not.
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Answer 1

Answer:

x=a , y=-a

a+(-a) =0

a-a=0

y=x-a

0=x-a-y

0=x-y

x-y=0

thus (a, -a) lies on y = x - a

Answer 2

Answer:

given is y=x-a

RHS= x-a=a-a=0≠y

(a,-a) does not lie on y=x-a

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