What this graph called and what is its equation?

Question

I am not a mathematician and the last time I used a formula complexer than sin(x) was during my university time about 10 years ago.

Recently I saw an interesting graph but I couldn't find its formula or even its name.

here is an almost representation of the graph.

every time the graph descends, it descends to the top of last peak (in y value).

I like to know

@AlexBecker, Thanks for the answer, it is close, but it does not descend to top top of last peak here it is — AaA, Apr 16 '13 at 02:21

score 2 · Accepted Answer · answered Apr 16 '13 at 02:24

2

I believe this does the trick: $$f(x) = \frac{2}{3 \pi} x + \cos{x}$$

It doesn't have any special names I'm aware of, though.

answered Apr 16 '13 at 02:24

Thanks, this is exactly the answer I was looking for. You mathematicians have an amazing world! Google has a facility to see your graph here is the link – AaA Apr 16 '13 at 02:29

1 Answers1