The table below shows the outputs y for different inputs x:
input
(x) 1 1 3 3
output
(y) 4 2 12 6
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 paddle boat for x hours is shown below:
f(x) = 20 + 10x
what is the value of f(120), and what does f(120) represent? (5 points)