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A function is increasing $(↗)$ if its $y$-value increases when moving from left to right, and it's decreasing $(↘)$ the $y$-value decreases. This means that the left half of the graph is decreasing and the right half is increasing.

It's decreasing up until $x=0,$ and then it starts to increase. It gives us the following intervals. $Decreasing:x≤0Increasing:x≥0 $

b

The function is increasing up until $x=-2.$ It's also increasing from $x=3$ to infinity.

Between these intervals the function values decrease going left to right. That means it's decreasing.This gives us the following increasing and decreasing intervals. $Decreasing:Increasing: -2≤x≤2 x≤3andx≥3 $

c

This graph is a straight line, which means the function is either increasing or decreasing for **all ** values of $x.$ Here, we note that the function values increase when moving to the right — the function is increasing.