Please be warned that teh polynomial tendline as displayed on the graph looks lovely (appears to fit the data).
Under chart options, the equation can be displayed.
However, the equation can be quite badly wrong, and we have not found the reason behind it. We find that using the displayed...
IN sworks 2001+, it is easy to create configurations either by manual dimension change ( option = this configuration only) or by design tables, and even accidentally by both methods.
Over time, it becomes less easy to remember what differs between configurations,and accidental mistakes arise...