Of lines, plots and curves

Sometimes I wonder how life (as we know and remember it) is nothing but a set of "points in time"...

...as if all the decisions we take, every single day, can be plotted, and ultimately (might) fit a (standard?) curve...
Of course everyone's curve will be different/may be even unique.
Although I'd rather people's life curves will be more or less similar ultimately, once you account for everyone's share of ups and downs...

but the point is, will we be able to map out a standard curve out of our life experiences?
Perhaps this is what they mean when they say, "The days are long, but the years are short...?"

The X axis for sure is time. The Y axis can be anything you value : happiness, satisfaction, success, health, wealth, relationships - whatever you fancy to plot.

Will this then, necessarily fit some standard curve?
If yes, can we then extrapolate our life/happiness/success/health based on past mapped points?
And can we then change the future points and the curve if we think we are sloping beyond a 'threshold'?

I wonder...