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• 11:00, 19 March 2022 0kelvin talk contribs created page Increasing and decreasing functions (Created page with "At school we learn to identify crescent and decrescent intervals of functions by inspecting their respective graphs. If the teacher explains the rate of change we can have a better understanding of it. Else we are left with the argument that the graph shows the obvious and no further explanations. What we don't learn is that a derivative is a tool that we need to prove that the function is crescent or decrescent in a certain interval. Case 1 the tangent is positive, wit...")