The table below shows the square roots of different numbers: number (x) 4 4 9 9 square root (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 car for a week and driving it x miles is shown below: f(x) = 90 + 0.11x what is the value of f(300), and what does f(300) represent?