Is it possible to change the letter in the equation of a trendline?

Hi,

I’m building graphics with trendlines. I’ve got multiple trendlines in one graphic and all the the equation start with f(x)… I’d like to change, in example, f(x) to g(t). Is it possible?

Thanks

The option to rename the function is located in the settings window for the trend line (LO6.2).