Question can be written as : is x, y >0

1. give x-y =1/2

2. gives

x >y if y>0

x <y if y <0

1. tells x is to the right of y on number line i.e. x>y

2. tells x and y are of the same sign and x>y if both are positive or x <y if both are negative

Combining 1&2--> x>y and x,y>0