Topic: Bug report: y=kx+m with a very big k and a very small m
First of all, yes, I am aware that I can use relationships or parametic functions to create vertical lines. I was basically testing how close it was possible to get by using standard functions.
I defined two constants, "inf" and "xpos". xpos = 8, and inf = 2900000 (2.9*10^6).
I created a standard function as: "y=inf*x-inf*xpos".
As I changed the value of inf to something even bigger, I noticed that sometimes the function wasn't visible at all. Zooming out or in made the function appear sometimes, but it disappeared again later. I created an animation of the graph using Calc -> Animate, Constant: inf, Range: From: 2900000, To: 3500000, Step: 10000. I noticed that in the animation, the graph was sometimes visible and sometimes not. Couldn't figure out why.