Answer:
The correct option is D) x can be any real number.
Step-by-step explanation:
Consider the provided equation.
[tex]y=4^x[/tex]
The given function is in the form of Exponential function:
[tex]y = a^x[/tex]
Here, a is 4, and it can take any value for x.
The graph can take negative as well as positive value of x.
The graph of the function is shown in figure 1.
Thus, the correct option is D) x can be any real number.
