Math functions help?

[MERRY-Guitar Obsessed]

I need pictures of anything on which I can plot functions graphs. I am not allowed to do parabola or a line but I can do the rest. Any good ideas/pictures/pictures of structures which resemble any functions? Pleasse help and Thanks!
It is the latter cwcc, but my teacher aready used Gateway Arch in St. Louis as an example... So I m looking for something else. The Eiffel tower is verry common too.
soares11, I already have a program. I m looking for pictures of structures which I can use to analyse.

[soares11]

there are several programs that that u can download i am using curve expert

[CwCc]

I'm not sure I understand what you mean...
do you want situations that can be modeled with functions, or physical structures that have shapes that resemble those of certain functions?
you made it sound like the latter,
how about the Gateway Arch in St. Louis?
it's shaped like a hyperbolic cosine