Chapter 2 - Differentiation - 2.1 Exercises: 41

$y=x-4$

Work Step by Step

For parabolas, the slope of the function is zero at the vertex and increases as the input increases. The slope decreases as the input decreases. Since the vertex of the function $f$ is at $x=4$, the graph of $f'$ resembles $y=x-4$ which as an output of 0 at $x=4$

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