In a polynomial equation, the degree can be determined by counting the highest power of the variable. For example, in the equation 4x^3 - 2x^2 + 9x, the degree is 3. The leading coefficient is the coefficient of the term with the highest power of the variable. In this case, the leading coefficient is 4. The constant term is the term without a variable, which in this case is 0. The domain of a polynomial function is the set of all possible input values for the function. In this case, the domain is all real numbers. The range of a polynomial function is the set of all possible output values for the function. In this case, the range is also all real numbers.