I sometimes noodle around on google while my students take their quizzes. Our current topic was quadratic functions so I did an image search on “parabola.” This is what I got.
I am so offended. I had been telling students that a parabola was a special type of arc with special properties and had made a point of distinguishing it from a catenary curve like that of the St. Louis Gateway Arch. Yet here was the St. Louis arch, random curvy things, rainbows (later in the image list) etc. This is a demonstrations of the fallacy of crowd-sourcing. As Charlie Brown would say, “Aaugh!”