roastedchips wrote:

Which of the following equations has only one integer pair as solution?

A) y = 2x

B) y = x/2

C) \(y =\sqrt{5}*x\)

D) y=x+1

E) y=1/x

A) x=0,y=0 ; x = 1,y=2 ........

B) x=0,y=0 ; x=1, y=1/2 ..........

C) x = 0, y = 0 .. There is no other integral value of x which will produce integral value of y.

D) x=0,y=1 ; x=1,y=2

E) x=1,y=1 ; x=-1,y=-1

So, Answer C

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