Parabola vs. “straight line” visual gag

{
  "input": {
    "prompt": " Illustration split-panel: left panel shows a crisp 45° diagonal line on graph paper labeled “just a line at 45°,” right panel shows a bold parabola labeled “symmetry about the y-axis,” with small annotation arrows pointing out “symmetric,” “not a line,” and “internet metaphor: questionable.” Style: clean editorial ink with muted colors, math-class aesthetic."
  }
}