Blackboard with chalk marks showing a double dip

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Size: 6004px × 3604px
Photo credit: © Alan Cotton / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: black, blackboard, business, chalk, chalkboard, college, copy, decline, dip, double, drawing, drop, dusty, education, graph, growth, illustration, incline, increase, innovation, inspirational, invention, inventive, inventiveness, learning, positive, recession, rise, school, sign, space, text, uni, university