Final answer:
The function g(x) = -81x + 5 does not have a minimum or maximum point.
Step-by-step explanation:
The function is g(x) = -3^2 * 9x + 5 = -9 * 9x + 5 = -81x + 5. Since the coefficient of x is negative, it indicates that the function is a downward sloping line. As there is no x^2 term, the function is a linear function. Linear functions do not have a minimum or maximum point. Therefore, the answer is option c) Neither minimum nor maximum.