The image is a photograph of a blackboard with mathematical equations written on it. The equations are written in white chalk and are arranged in a grid-like pattern. The background of the blackboard is a light green color, and there is a ruler on the right side of the image. The blackboard appears to be old and worn, with some scratches and scuff marks visible on the surface. The text on the whiteboard reads "Dx = 3.45cm dx = 11.5cm y2x = 6.55cm".