The table below shows the fourth roots of different numbers: number (x) 16 16 81 81 fourth root of the number (y) 2 −2 3 −3 part 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 boat for x hours is shown below: f(x) = 32x + 75 what is the value of f(8) and what does f(8) represent? (5 points)