The next term is 1.4 larger than the one before it, so the appropriate choice is
_____
However, the description
also correctly describes the relationship between a1 and a2, for example. While this equation is technically correct, it is less useful to work with, so is probably not the expected answer.
The corresponding point is :
f(2) + 4 => f(2) is given which is 1.
1 + 4 = 5
So the corresponding point is (2,5)