Dessin à la main d'un diagramme sur tableau noir - Photo & image de stock

Young female teacher finishing to draw her chart for a mathematics class at the blackboard

On a dark marble surface is drawn with chalk a diagram that shows only a positive trend. This was corrected into the negative - concept for economic turnaround into the recession

Analysis of the business chart on a blackboard

Analysis of the graph on blackboard

Graphical representation of mathematical colcoli on blackboard and chalk

Graphs on a hands of businessmen

Decline chart

On a dark marble surface is drawn with chalk a diagram that shows only a positive trend. This was corrected into the negative - concept for economic turnaround into the recession