Answer:
im not sure of the answer but hopefully this will help
Step-by-step explanation:
basically the intervals in which its increasing and decreasing depend on the leading coefficient and the vertex
since this is opening up, the intervals will be
the function is increasing (x coord of vertex, infinity)
the function is decreasing (-infinity, x-coord of vertex)
the answer is D
i guessed until it gave me the answer yw
20 sides
the sum of the exterior angles of a regular polygon is 360 degrees
so the
No. of sides
360 /18 = 20
