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)

:i need some real : a store sells shirts to the public at one pricing scale and wholesale at another pricing scale. the tables below describe the cost, y, of x shirts. (after tables) how do the slopes of the lines created by each table compare? the slope of the public table is 3/4 of the slope of the wholesale table.the slope of the wholesale table is 3/4 of the slope of the public table.the slope of the public table is 12 times greater than the slope of the wholesale table.the slope of the wholesale table is 12 times greater than the slope of the public table.