Increasing on the intervals decreasing on the intervals

The increasing and decreasing intervals are marked on the graph and attached below.

The red arrow mark shows the part where graph is decreasing

The green arrow mark shows the part where graph is increasing

There is no end point or starting point for the graph

The graph starts decreasing at -∞  and it decreases till it reaches -2.5

Also the graph start decreasing at 0 and goes to +∞

So we have two decreasing intervals

(-∞ , -2.5) U (0, ∞)

The graph starts increasing at -2.5  and it increases till it reaches 0

So increasing interval is

(-2.5, 0)

19.side- angle- side

20. angle- side- angle

step-by-step explanation: