LaTeX.org

Their figures may not be perfect, but they do construct other interesting figures with the same program. Take a look at the arrows that point to the electrodes in the galvanic cell below. The arrowheads are exactly the same as the ones used for the axes in the original post. Could they just be using ...

Does anyone know what program the College Board uses to plot, draw figures, etc.? A screenshot of one of their plots is attached. I can't really tell if they use LaTeX.