Using translation concepts, it is found that the correct option regarding function [tex]f(x) = 2^x + k[/tex] is:
D) The graph of f(x) is shifted k units below the graph of g(x).
A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction in it's definition.
In this problem, the parent and translated functions are given by, respectively:
[tex]g(x) = 2^x[/tex]
[tex]f(x) = 2^x + k, k < 0[/tex]
Since a negative number was added to g(x) to generate f(x), it is said that we have a shift down, hence option D is correct.
More can be learned about translation concepts at https://brainly.com/question/4521517