I was asked to draw the graph of $x=i^2y$ where $i$=iota in an interview.
So, I sketched it as a normal $\ x+y=0\ $ line in the $x$-$y$ graph. But, the interviewer said it was wrong.
He further said that the flaw in my graph is that: at the point $(0,0)$ which is the origin it is broken, meaning that the "line" (requested set of points) will not cross through the origin.
Namely, it should be like {$x+y=0$ minus the origin point} . However, he didn't tell me the reason.
So, my doubt is that why is it so? Why it is not defined at origin?