Will reward brainliest! the table below shows the cubes of different numbers: number (x) 3 −3 5 −5 cube of the number (y) 27 −27 125 −125 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 car for x days is shown below: f(x) = 27x + 18 what is the value of f(6) and what does f(6) represent? (5 points)