PartB needs to be solved.The table below shows the fourth powers of different numbers:Number (x) 1,-1,3,-3Fourth power of the number (y) 1,1,81,81Part A: Does the table represent y as a function of x? Justify your answer. (5 points)Part B: The total cost f(x), in dollars, for renting a townhouse for x months is shown below:f(x) = 875x + 750What is the value of f(12) and what does f(12) represent? (5 points)