Kevin is observing the population of the fish he put into a pond. He built a pond and populated it with 500 fish. The population of the fish doubles every year.

Use x to represent the number of years and y to represent the population of the fish.

Enter an equation that represents this scenario in the box.

PS: The answer is either y=500(2)^x or f(x)=500(2^x)
I'm not sure which one is correct.