Final answer:
The range of the function
is all real numbers greater than 9, expressed in interval notation as (9, ∞).
Step-by-step explanation:
The range of the function
can be determined by analyzing the behavior of the exponential function. The base, which is 3 in this case, is a positive number greater than 1. Therefore, as x increases, the value of
grows larger without bound. This exponential growth occurs for all real values of x. Since every output of
is a positive number and adding 9 shifts the graph vertically upward by 9 units, the smallest value f(x) can take on is just above 9, no matter how large or small x is. Therefore, the range of
is all real numbers greater than 9, which can be written in interval notation as (9, ∞).