I read some of the posts about this topic, but I still couldn’t figure it out without having to change my model to MINLP. I would rather not use binary variables if at all possible.
I am trying to model an equation that replicates this behaviour.
The x-axis is a variable in my model (C). And the math for the three ranges:
I thought about just modelling it based on the quadratic for the 280-1800 range and then do something afterwards to add or subtract the difference when <280 and >1800.