Describe the function over each part of its domain. State whether it is constant, increasing, or decreasing, and state the slope over each part.

Answer:
domain (0,12000) is constant and slope =0
domain (12000, 38000) is decreasing and slope = negative
Step-by-step explanation:
We analyze the given graph
From x=0 to x=12,000 the y values remains the same
the value of y is constant, there is no increase or decrease in y
So from x=0 to x= 12000, the graph is cost is constant
Hence slope =0
domain (0,12000) is constant and slope =0
From x=12,000 to x=38,000 the y values is decreasing
For decreasing y values the slope is negative
So we can say the slope is negative
domain (12000, 38000) is decreasing and slope = negative