A function is increasing if its -value increases when moving from left to right, and it's decreasing the -value decreases. This means that the left half of the graph is decreasing and the right half is increasing.
It's decreasing up until and then it starts to increase. It gives us the following intervals.
The function is increasing up until It's also increasing from to infinity.
This gives us the following increasing and decreasing intervals.
This graph is a straight line, which means the function is either increasing or decreasing for all values of Here, we note that the function values increase when moving to the right — the function is increasing.