The present value of a house is $242,000. The value of the house increases at the rate of 4% every year. A function is shown below:  f(x) = 242,000(1.04)x  What does f(x) represent?  
The original value of the house  
The future value of the house after x years  
The increase in the value of the house each year  
The increase in the value of the house after x years