Step 1 :A polynomial function is a function that can be expressed in the form of a polynomial. In a polynomial, each term has a variable raised to a nonnegative integer power. Looking at the given function, we can see that one of the terms has a variable in the denominator, which is equivalent to the variable being raised to a negative power. This does not fit the definition of a polynomial, so the function is not a polynomial function. Therefore, we don't need to state its degree, write it in standard form, or identify the leading term and the constant term.
Step 2 :The correct choice is A. It is not a polynomial because the variable x is raised to the power -7, which is not a nonnegative integer.