Answer:
Option: B is the correct answer.
B. Exponential decay
Explanation:
Clearly from the graph we could observe that the graph is a decreasing function since with the increasing value of " x " the value of y is decreasing.
Hence, option: C and option: D are discarded.
Also the graph is not an linear decreasing graph.
Since the curve is not a straight line.
- Now we know that a exponential decay function is in general represented by the expression:

where 0<b<1
such that the curve decreases gradually with the increasing value of x.
Hence, the function that is represented by the graph is:
Exponential decay function