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Step 1:

Increasing / Decreasing test :

If $\"\"$ on the interval, then f is increasing on the interval.

If $\"\"$ on the interval, then f is decreasing on the interval.

Observe the graph $\"\"$ .

$\"\"$ over the intervals $\"\"$ and $\"\"$ , therefore the function $\"\"$ is increasing on the intervals $\"\"$ and $\"\"$ .

$\"\"$ over the interval $\"\"$ , therefore the function $\"\"$ is decreasing on the interval $\"\"$ .

Solution :

The function $\"\"$ is increasing over the intervals $\"\"$ and $\"\"$ .

The function $\"\"$ is decreasing over the interval $\"\"$ .

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