Created vs Resolved Chart "Trend of unresolved" - How to calculate?

[Gary Fitzgerald]

What is the formula used to calculate the Trend of unresolved subplot for the Created vs Resolved chart?

In another post, Nic said  "A trend is not an absolute predictor, a generaised predictor of direction.  It's extrapolated from the data over time, it's actually very rare that a trend would hit your actual count on any given day/week."

How is this calculated?

My searches haven't found anything in the community or documentation. Also genraised maybe misspelled and actually generalized.

[Nic Brough -Adaptavist-]

It's mostly a simple average over time, weighted by age.  If you imagine you put simple dots on a graph, one per day, at a height proportional to the amount done that day, then draw a line that runs closest to the middle of all of them, then extend it into the future.

(Yes, I was having a bad spelling day, the word is indeed "generalised")