Is the graph increasing, decreasing, or constant?

Constant function.

Step-by-step explanation:

The graph shows a horizontal line, where clearly all values of the variable plotted on the vertical are the same (constant = -4) for all values of the horizontal coordinate. Since y doesn't change, we  refer to this function as a constant function.

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)