Answer:
The one on the top left
Step-by-step explanation:
An exponential function is a function that exponentially grows, so multiplication must be involved. In this case, the option on the top left has a pattern of taking the previous term and multiplying it by 2. The two on the right aren't close to growing exponentially. That leaves us with the one on the bottom left. We see the graph is declining, and the previous term is being divided by 3. HOWEVER, the exponent (number you multiply the previous terms by) is less than 1, and that brakes a rule, so it can't be that one.
Hope this helps.
