The pair of equations x = a and y = b graphically represents lines which are


x = a and y = b represents a rectangle with lines x = a for a>0 and x = - a for a <0 ;

y = b for b>0 and y = - b for b<0;



As it is clear from the figure, the lines will intersect at x = a and y = b or (a,b) point.

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