Which of the following is not a polynomial?
a 11p-7q
b 8xy^4-5x^3y
c 2-x
d-4/y

A polynomial is an expression of more than two algebraic terms. Among the given expressions above, the answer that is not a polynomial would be option D. -4/y. This does not follow the rules of being a polynomial because y is a denominator; therefore, this is not a polynomial.

The answer is that the rate of change is $50 per 1 monthhope this ; )