Consider the function that assigns to each real number three times itself and four. If we denote this real number by x, and the function by f we may express it as

It is customary to also denote this function by y = f (x).

In the expression y = f (x), x is called the independent variable, whereas y is called the dependent variable.

In the expression y is called the dependent variable.

In the equation y = f (x)=3x+4, the dependent variable y is a function of the independent variable x.

As also understood from the information given, the correct answer is E. All of the statements in the options are correct.