The original function f(x) = 2x+3.
And the transformed function is g(x) = 2x+4.
We can see that if we add 1 into function f(x), we get
f(x) +1 or 2x+3+1 = 2x+4.
So, 1 is being added in original function f(x) and we get g function g(x) = 2x+4.
According to rules of transformations, when we add some number k in the given function, it move k units up and if we subtract k from given function, it move k units down.
Therefore, correct option is B option.
B. translation 1 unit up.
