f(x)= 1/x^2 - 7

Is f(x) a polynomial function ? If so what's it's degree and type?

f(x)= 1/x^2 - 7

Is f(x) a polynomial function ? If so what's it's degree and type?

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I suggest you look at Tamara's response here: http://www.wyzant.com/answers/11309/needed_help_with_this_math_question

All polynomial functions must be defined for all values of x. Since x=0 would cause this function to be undefined (since you cannot divide by zero), this is not a polynomial function. Basically, if an x is in the denominator of a function it cannot be a polynomial.