Career Dips

I read in ET recently about a formula on how your career goes up and down.

Governed by a formula y = 2x + 3 sin(x) where x is the year of your experience

Now using excel draw a graph) to see your dips.

Following example is of mine, starting from 1990 till I would retire. Amazingly, this works. True to the extent of my career in the past.