Answer:
This function is not well-defined, because it does not specify what the dependent variable is. A function is a relation that assigns exactly one output to each input. Usually, we write functions in the form of y = f(x), where x is the independent variable and y is the dependent variable. In this case, we can rewrite the function as y = 5.1/2 - 7, and then we can say that the independent variable is x and the dependent variable is y. Alternatively, we can use any other letters to represent the variables, as long as we define them clearly. For example, we can also write z = 5.1/2 - 7, and then say that the independent variable is z and the dependent variable is y. The important thing is that for each value of the independent variable, there is only one value of the dependent variable.
Explanation: