What does function notation typically look like?

Function notation is a way to define a function in terms of its input variable (often denoted as x) and its output. In this specific example, the notation "f(x) = x + 2" clearly illustrates this concept. Here, "f" represents the function itself, while "x" is the input, and the expression "x + 2" describes how the input is transformed to produce the output.

This notation allows for easy identification of a function and what it does to the input. By writing it in this way, it becomes intuitive to understand that we can substitute different values for "x" and find corresponding outputs. In this case, if you were to input the value 1, for instance, f(1) = 1 + 2 would yield an output of 3.

The other answer choices represent different mathematical expressions or concepts that do not define a function in the same way. For instance, "y = mx + b" represents the equation of a line but does not use function notation. "g(x) = ax^2 + bx + c" is similar to function notation, but since the question specifically asks for what function notation typically looks like, the inclusion of "f" rather than