Answer:
The change in the depth of water per minute
Step-by-step explanation:
We are given a graph that shows the depth of water in a bathtub as water drains out
Slope is the rate of change
We can see in the graph that on increasing the value x , the value of y decreases .
x axis represents the minutes
y axis represents the depth of water(inches)
So, On increasing minutes , the depth of water decreases
So, there is a change in depth of water per minute
So, Option D is correct
The change in the depth of water per minute