Overview
Regarding the same question you did for me a few days ago....(attached info). These are the comments I need answers to..."your reasoning is correct, and you nailed the intervals, but you also need to show the mathematical expressions for the functions you plotted, in addition to their graphs! By the way, don't you have any doubts about the point (0, -0.111) where you believe the tangent line is horizontal? I do! The slope of the tangent should be zero at point (0, 0) instead. In order to clarify this issue, can you please insert a link to the interactive graphs in desmos, so that we can see the function and the tangent line at each point of the curve."