Question

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 1

it would be increasing, because the numbers are getting higher.

Answer 2

domain (0,12000) is constant and slope =0

domain (12000, 38000) is decreasing and slope = negative

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