Answer:
(-8, -4), (-2, 6), (0, 0), (2, 10), (5, 0)
Explanation:
A critical point is a point where the slope is zero or undefined. On this graph, every marked point except (-5, 0) is a critical point.
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Additional comment
Critical points will be found at local extreme values, places where the tangent is vertical, and places where the slope has a discontinuity (such as (2, 10) and possibly (5, 0)).