The image displays an indoor educational setting, specifically a classroom or lecture hall in Mexico City, Mexico

The image displays an indoor educational setting, specifically a classroom or lecture hall in Mexico City, Mexico. A large, black-framed digital display screen is centrally mounted against a red brick wall. The screen exhibits a presentation slide in Spanish, titled "Variables de desviación" (Deviation Variables), detailing mathematical concepts, definitions for negative ($n_i$) and positive ($p_i$) deviation variables, and their application in an equation ($f(x) + n_i - p_i = t_i$). Bullet points on the slide explain properties of deviation variables, including their dependence and inability to be basic variables simultaneously, and conditions for goal satisfaction based on inequality type. Above the screen, a cream-colored ceiling beam or soffit is visible, with several reddish-brown electrical conduits protruding from the brick wall beneath it. A white whiteboard or projection surface is partially visible to the right of the digital display. In the lower foreground, the top edge of a second electronic device, possibly a laptop screen with a metallic trim, displays a mostly red interface. No individuals are present in the scene.