Understanding coordinates in a plane

Question

I am learning animation. Position has two value, X and Y. X control left right, Y up and down.

So the tutorial am following: there the tutor positions the hands of a cartoon character in a way that they have the same Y value ($638$) and different X values ($733$ and $347$). (I attached the figure)

My question is if Y has same value, the hands should be in the same line, in an up and down manner right?

But in the tutorial that doesn't happen. The hands are sitting side by side.

I drew myself a graph, there I took $(x,y)= (3,5), (2,5)$, there I see both of them stay in same line in Y axis.

I must be thinking something wrong. What is that? If my graph makes sense then why I am seeing something different in the tutorial?

Answer 1

“$Y$ controlling up and down” means that points with the same $y$-value are the same amount up or down. Different positions, which are the same amount up or down, are side-by-side. This is what you observed in the tutorial. This is not what you did when plotting points yourself.