Why do plane coordinates start with XY and not YX?

Question

Mathematics

Why do plane coordinates start with XY and not YX?
Let's assume there are no negative coordinates on the plane, only positive ones, and if you draw a diagonal line, then it would be more correct to draw YX and not XY.
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Answer 1

First, consider the one-dimensional case - the axis. For Western culture, with writing from left to right, it is logical to choose the positive direction from left to right. Let's designate this axis somehow. For example, X.
Now let's add the second coordinate. The second axis is orthogonal to the first. It is logical to choose the positive direction up. Grass, trees and people grow up. Well, let the axis also up. Let's designate this axis somehow. Let's take the next letter - Y.
This is how we got what we got.