Which of the following is a parent function?

Answer:
C) f(x) [tex]2^{x}[/tex] is correct option.
Step-by-step explanation:
Given : Different function.
To find : Which of the following is a parent function.
Solution : Parent function : A parent function is the simplest function that still satisfies the definition of a certain type of function.
Since, f(x) [tex]2^{x}[/tex] is simplest form of exponential function .
Therefore, C) f(x) [tex]2^{x}[/tex] is correct option.