Distances and vertical asymptote

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Distances and vertical asymptote

This is the question…I can’t even come close to explaining this in easy terms.

In order for a film camera with a fixed focal length F to focus on an object located a distance x from the lens, the film must be placed a distance y behind the lens. F, y, and x are related as follows

Now suppose a camera has a lens with focal length F = 65.

1.Explain what happens to the focusing distance y as the object moves far away from the lens.

2.Explain what happens to the focusing distance y as the object moves closer and closer to the lens.

3.In general, why is it not possible to cross a vertical asymptote?