LaTeX.org

Yeah, I couldn't see it in there. Do you know of any other galleries? I'm sure someone must have made this.

Can anyone direct me to an Asymptote (or other appropriate language) picture of a function with a secant line?

The minimum example is irrelevant because I am not experienced enough to write my own code and therefore have to work from someone else's template. I need to find the problem there.

Yeah that works fine in the latex template but I'm using a book template I downloaded from the internet, is there a particular piece of preamble I need to make it close quotations?

I am running TeXShop 2.43 and have read that to do quotes you use ``'' with the word in between. If i just type ``'' and then typeset it comes up correctly but if I put a word between the quotation marks the closing one disappears. I also tried using single quotation marks but these just don't show ...