Answer:
Table: C has the NEGATIVE rate of change.
Explanation:
We are asked to find which table show the NEGATIVE rate of change.
The rate of change(R) is given as:

for the points:

So, the negative rate of change will be observed in the table in which the y value decreases with the increasing x.
Such a rate of change is observed in Table C since we could see the change as:
Table: C
x 1 2 3 4
y 4 2 4/3 1
Now the rate of change is:
Hence, Table C is the correct answer.