The function represented is analyzed below.
<h3>How to illustrate the function?</h3>
The function represented by the graph is related to a piecewise function.
The key features of the function include:
The function has a constant value in interval (0, 15) which is 40.
It decreases at first and then increases from 45 to 65.
It increases linearly from 65 to 90.
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