Sketch the Graph of a Function using Calculus Only | Example 3

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There are a lot of things that are poorly done. 1) Use a parenthesis and not a bracket next to negative infinity or positive infinity for an interval. 2) The point of inflection is an actual point on the graph so should have the y coordinate along with the x coordinate of 1/2. You use that point then to actually help draw the graph intstead of just saying afterwards that it appears to work. The way you drew it it looks like the concavity changes when x is about - .4 3) The changing of scale is bizarre, going upwards each tick mark is worth 3.5 and going down each tick mark is worth 10. That contributed to the concavity changes not showing up clearly.

ubk