Long description: Ch25bispicJPW
Alt text: The image displays two graphs, (a) and (b), illustrating the behavior of a function over different intervals on the horizontal axis labeled 'x'.
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- Graph (a) shows a downward-sloping curve that intersects the horizontal axis at a point labeled 'm', with the interval to the left of 'm' indicated by 'a' and the interval to the right of 'm' indicated by 'b'.
- Graph (b) shows an upward-sloping curve that intersects the horizontal axis at the same point labeled 'm', with the interval to the left of 'm' indicated by 'a' and the interval to the right of 'm' indicated by 'b'.