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.
part b: the total cost f(x), in dollars, for renting a paddleboat for x hours is shown below:
f(x) = 20 + 10x
what is the value of f(120), and what does f(120) represent?

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?