which function below represents the arithmetic sequence 3,7,11,15 …?

f(n)=4+3(n-1)
f(n)=4+3n
f(n)=3+4n
f(n)=3+4(n-1)

The correct function that represents the arithmetic sequence 3, 7, 11, 15 ... is:

f(n) = 3 + 4(n-1)